We have had lots of threads on this
http://www.webproworld.com/viewtopic.php?t=19968
http://www.webproworld.com/viewtopic.php?t=17911
http://www.webproworld.com/viewtopic.php?t=15018

IMHO, if there is any benefit, its miniscule. Perhaps you could do it for new pages, but its not worth the effort of changeing the names of existing pages.

CBP