QB carousel never works and does more good than harm for the team.
Word mixup? Or do you mean that?
also, P55, Vick/Kolb is not a QB carousel as I meant it in my post(even if it technically could be one) in the way I don't feel the wildcat is a QB carousel. Just a different formation in a sense; in what example you are giving, Kolb and Vick would be running different plays. You are totally correct that in that case it can work very well, though honestly I think the way Vick was playing means that it doesn't matter. Don't think I've seen him be so consistent with his arm ever before.
in the case of a QB carousel here, it'd be the same offense basically just going in circles with the same two QBs. blech.