Two points I'd like to make about Tim Tebow and how he really is responsible for Denver's success since he's taken over as the starting QB.
1. Tebow doesn't turn the ball over. He has just 1 turnover in the five games he's started. That is huge! You are not giving away free points to opponents or putting your defense in the position of having to defend a short field. That seems to be a factor that keeps getting over-looked. Many people want to give the Broncos defense the credit for the recent success rather than credit Tebow (praise be his name). It is much easier for the defense to be successful if the opponent always has 80-yards to drive to score and Tebow not turning the ball over is a big contributing factor to that.
2. Tebow's style of offense has to be wearing on the defense. I suggest that part of the reason Tebow can have that 4th quarter success is because he's worn the defense down during the first 3 quarters. It's harder to catch and tackle a fast big guy like Tebow if you are tired.
These were two points that I don't think have been getting enough if any mention.