My concern is that Cardale will be the JT of the Virginia Tech game. It took JT a while to develop. It takes any QB time to develop. Maybe Cardale would have been as good as JT if he started at the beginning of the season, but this will be his first game. I think some mistakes are to be expected. And as we saw in the Penn State game, a single pick-6 can be huge.
The only backup I can recall who jumped in and played well in his first real playing time was Kenny G in the Purdue game. I guess you could also include Krenzel in the 2001 Michigan game after Bellisari was suspended.
The only thing that gives me confidence is that Wisconsin has to be feeling confident and therefore will be less hungry. Everyone has been building them up all week. Just like everyone built up Michigan State. It is just human nature to be impacted by that.