I can't speak for everyone, but I think we're being very cautiously optimistic. This is a game we HAVE to win. I think we feel similarly to how most mid-level BCS schools feel when they play non-BCS schools. In other words, we have everything to lose and little to gain.
Add that to the fact that we've been terrible OOC on the road in the past.
Basically, I'm sure not going to talk any smack because I don't want to jinx anything. I'm not shaking in my boots, but I'm not counting my chickens either. Enough cliche's for you?
In case I haven't been clear, I do think BYU wins this game.