Here's an interesting article I read that digs a little deeper to uncover how Tebow is helping the Broncos win. Whether you agree with everything written there, its an interesting read.
Tim Tebow's success with Broncos can be easily explained with stats - Kerry J. Byrne - SI.com
That is an interesting article.
I also found interesting the list of QBs Tebow has played against:
Matt Moore
Shaun Hill
Carson Palmer
Tyler Palko
Mark Sanchez
Philip Rivers (a real QB!)
Christian Ponder
Chad Hanie
Competition may have something to do with that record as well...