Index: wp-admin/includes/theme.php
===================================================================
--- wp-admin/includes/theme.php	(revision 26689)
+++ wp-admin/includes/theme.php	(working copy)
@@ -197,9 +197,10 @@
 			'right-sidebar' => __( 'Right Sidebar' ),
 		),
 
-		__( 'Width' ) => array(
-			'fixed-width'    => __( 'Fixed Width' ),
-			'flexible-width' => __( 'Flexible Width' ),
+		__( 'Layout' ) => array(
+			'fixed-layout'      => __( 'Fixed Layout' ),
+			'fluid-layout'      => __( 'Fluid Layout' ),
+			'responsive-layout' => __( 'Responsive Layout' ),
 		),
 
 		__( 'Features' ) => array(
Index: wp-content/themes/twentyeleven/style.css
===================================================================
--- wp-content/themes/twentyeleven/style.css	(revision 26689)
+++ wp-content/themes/twentyeleven/style.css	(working copy)
@@ -7,7 +7,7 @@
 Version: 1.7
 License: GNU General Public License v2 or later
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
-Tags: dark, light, white, black, gray, one-column, two-columns, left-sidebar, right-sidebar, fixed-width, flexible-width, custom-background, custom-colors, custom-header, custom-menu, editor-style, featured-image-header, featured-images, flexible-header, full-width-template, microformats, post-formats, rtl-language-support, sticky-post, theme-options, translation-ready
+Tags: dark, light, white, black, gray, one-column, two-columns, left-sidebar, right-sidebar, fixed-layout, responsive-layout, custom-background, custom-colors, custom-header, custom-menu, editor-style, featured-image-header, featured-images, flexible-header, full-width-template, microformats, post-formats, rtl-language-support, sticky-post, theme-options, translation-ready
 Text Domain: twentyeleven
 */
 
Index: wp-content/themes/twentyfourteen/style.css
===================================================================
--- wp-content/themes/twentyfourteen/style.css	(revision 26691)
+++ wp-content/themes/twentyfourteen/style.css	(working copy)
@@ -7,7 +7,7 @@
 Version: 0.1
 License: GNU General Public License v2 or later
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
-Tags: black, green, white, light, dark, two-columns, three-columns, left-sidebar, right-sidebar, fixed-width, flexible-width, custom-background, custom-header, custom-menu, editor-style, featured-images, flexible-header, full-width-template, microformats, post-formats, rtl-language-support, sticky-post, theme-options, translation-ready, accessibility-ready
+Tags: black, green, white, light, dark, two-columns, three-columns, left-sidebar, right-sidebar, fixed-layout, responsive-layout, custom-background, custom-header, custom-menu, editor-style, featured-images, flexible-header, full-width-template, microformats, post-formats, rtl-language-support, sticky-post, theme-options, translation-ready, accessibility-ready
 
 This theme, like WordPress, is licensed under the GPL.
 Use it to make something cool, have fun, and share what you've learned with others.
Index: wp-content/themes/twentyten/style.css
===================================================================
--- wp-content/themes/twentyten/style.css	(revision 26689)
+++ wp-content/themes/twentyten/style.css	(working copy)
@@ -7,7 +7,7 @@
 Version: 1.6
 License: GNU General Public License v2 or later
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
-Tags: black, blue, white, two-columns, fixed-width, custom-header, custom-background, threaded-comments, sticky-post, translation-ready, microformats, rtl-language-support, editor-style, custom-menu, flexible-header
+Tags: black, blue, white, two-columns, fixed-layout, custom-header, custom-background, threaded-comments, sticky-post, translation-ready, microformats, rtl-language-support, editor-style, custom-menu, flexible-header
 Text Domain: twentyten
 */
 
Index: wp-content/themes/twentythirteen/style.css
===================================================================
--- wp-content/themes/twentythirteen/style.css	(revision 26689)
+++ wp-content/themes/twentythirteen/style.css	(working copy)
@@ -7,7 +7,7 @@
 Version: 1.1
 License: GNU General Public License v2 or later
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
-Tags: black, brown, orange, tan, white, yellow, light, one-column, two-columns, right-sidebar, flexible-width, custom-header, custom-menu, editor-style, featured-images, microformats, post-formats, rtl-language-support, sticky-post, translation-ready
+Tags: black, brown, orange, tan, white, yellow, light, one-column, two-columns, right-sidebar, fluid-layout, responsive-layout, custom-header, custom-menu, editor-style, featured-images, microformats, post-formats, rtl-language-support, sticky-post, translation-ready
 Text Domain: twentythirteen
 
 This theme, like WordPress, is licensed under the GPL.
Index: wp-content/themes/twentytwelve/style.css
===================================================================
--- wp-content/themes/twentytwelve/style.css	(revision 26689)
+++ wp-content/themes/twentytwelve/style.css	(working copy)
@@ -7,7 +7,7 @@
 Version: 1.3
 License: GNU General Public License v2 or later
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
-Tags: light, gray, white, one-column, two-columns, right-sidebar, flexible-width, custom-background, custom-header, custom-menu, editor-style, featured-images, flexible-header, full-width-template, microformats, post-formats, rtl-language-support, sticky-post, theme-options, translation-ready
+Tags: light, gray, white, one-column, two-columns, right-sidebar, fluid-layout, responsive-layout, custom-background, custom-header, custom-menu, editor-style, featured-images, flexible-header, full-width-template, microformats, post-formats, rtl-language-support, sticky-post, theme-options, translation-ready
 Text Domain: twentytwelve
 
 This theme, like WordPress, is licensed under the GPL.