It was one of the Legacy Servers so right now it's overfloweth with people. I hope SE opens up the server trasnfer servers sooner rather than later to help aleviate all this strain we're putting on the servers, but you may have to wait a good bit before it opens again.
Once the initial swell of people dies down things should free up a bit... With how negative people who are unable to play are being, it shouldn't take too long on that front.