Aye, what Warrior said.
This is likely due to the server issues Raz has been wrestling with over the past couple of days, and it likely accounts for any slowness of the login screen, switching maps, and so on. It's still running, of course, but for now we'll have to sit tight until Raz can make the hard drives behave again.
If we foresee the issue continuing for a longer period of time, though, we'll be sure to make an announcement.