edit - Oop! Already a thread. http://www.mmo-champion.com/threads/...en-ever-in-5-1
From the front page
So if you wanna solo bosses, no need to snag a raid group with someone every time.Raid groups are no longer necessary to enter pre-Mists of Pandara raid dungeons. Enemies in these raids that previously required more than one player to defeat are now more easily dealt with by players battling alone.
Wonder if by 'enemies' they mean trash, or bosses themselves. Hmm!