Hyperion is almost always locked from character creation, so ours is pretty crowded, that is all I know... Oh an they say those population websites aren't accurate. If you really want accuracy, SE is going to be releasing the first annual census numbers in a week or 2, you could wait until then if you absolutley want to be on the most crowded server. And if you do try to get on a hi-pop server, be preprared to deal with alot of frustration with having to wait for said server to allow character creation. You pretty much have to check it round the clock, an wait for an opening.