I believe we have fixed this, and that is a huge deal for our EE experience.
Cordor should now work perfectly, and other areas will follow later today. When I have a bit more time I'll provide full details on this, and how other servers can also prevent it.
This was our number 1 reported problem with EE, and I'm feeling pretty thrilled right now.
(We'll get to grips with FPS drops next)
EDIT: As promised, here are the details.
viewtopic.php?f=18&t=21248