The big guilds on the most populated servers (aka, Kyrios or however you spell it) won't go anywhere, but there's plenty of small guilds and non-guilded types that haven't poopsocked that much (either because they're not losers like us or just too much queue/error/crashing/etc), that would easily say "fuck this" and move to a fresh server with open land.
I'm the type that, if I lose even 5 minutes of playing a game I lose way too much interest in it. But objectively, we're talking 3-4 days of playtime for a MMO. Big whoop. Even if you did poopsock it, just poopsock it again.
But as others have pointed out - in a month, and more and more after that, queues and land and such will not be a big problem. I think the our server is popular enough that we'll still get queues here and there, but 5-10 minute queues, not the 2+ hour queues of launch weekend. Even after F2P launch. I suspect next weekend alone will be a lot better.