I agree with that quote - the game pushes people to that end. For that reason I don't blame people for "leaving their friends" (as the quote puts it). Most people who leave do so on good terms. I also agree that end-game raids only delay the lull. A friend of mine in a raid guild on a PvP server has been experiencing intermittant lulls as he gets the items he has always wanted. Then Blizzard strings him along with new epics. Blues do the same thing, but at least they are less painful to attain.