From a user perspective, if I log in and have to wait for 5 minutes it tells me the game is popular and full of players. If I see a server merge response, as a long time MMO player, as many of you know, server merge = death. With little exception. It sends the wrong messages to subscribers and why waste time on your character if it's going to be unplayable soon? Which partially explains why WoW is surviving so long, because you have faith that the time you sink into it, will be there for a long time.