Yeah and IF the Broncos want to win this, then they should utilize Willis Mcgahee in my opinion.
Even with that though, i think the Steelers D knows that Big Ben isn't all their in terms of mobility so they're going to have to step up and keep the game low scoring. And also you have to wonder Tebow's decision making, it's his first playoff game in the NFL going against a D that's in the playoffs every year.