Ya' know, seniority is everything, so until you get on somebody's seniority list, more and more people are getting their names ahead of you on the list. Whoever you can start building tenure with soonest, go for it. If it's not for you, then you can always change. That's my $.02 (I guess since this is my second post on this thread it would be my $.04, I hope that's acceptable)
CJ