Better description for 'Faster WP_Query'. Props simonwheatley. fixes …

…#20789

git-svn-id: http://core.svn.wordpress.org/trunk@20959 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/about.php

@@ -81,7 +81,7 @@
 	<div class="feature-section three-col">
 		<div>
 			<h4><?php _e( 'Faster WP_Query' ); ?></h4>
-			<p><?php _e( 'Post query optimized to avoid table scans.' ); ?></p>
+			<p><?php _e( 'Post queries have been optimized to improve performance, especially for sites with large databases.' ); ?></p>
 
 			<h4><?php _e( 'Faster Translations' ); ?></h4>
 			<p><?php _e( 'The number of strings loaded on the front end was greatly reduced, resulting in faster front page load times for localized installations.' ); ?> <?php _e( 'Also, better support for East Asian languages, right-to-left languages, theme translations, and more.' ); ?></p>