I rolled up a new Warhammer class on the Dark Crag server. I had read that the server was popping and I knew of a guild on the server. So, why not give it a shot? The 500 person queue on my WoW server was a subtle hint.
I can't comment on the guild much yet, but the server it totally crammed with crazy action. I did "join all" for tier one scenarios and I got into all three scenarios and they had plenty of people in them on both sides. I even did quite a bit of tier one open RvR. That's pretty impressive for WAR.