One or two guys may surprise you. I doubt it, but it's possible. The ultimate fighter tends to make guys improve because they get in good training and they start to take their game more seriously because of this once in a life time opportunity.
I've only watched a few episodes myself because I lost my provider.
They dont have one black belt or all american wrestler on the team. Its pathetic. Just get a guy like Koscheck or Maynard. Both raw as fcuk but had freakish athletic ability and with proper traing turned into great fighters. The guys they got now, are just garbage small circuit scrubs.