If you want become the Heisman Trophy winner, you have to lead your team to a great season. I'm not saying that Oklahoma had a bad season; I'm just saying that Florida had a better one.
The key difference in their seasons was leadership. Sam Bradford didn't carry the load like Tim Tebow did. Oklahoma had many key players, a lot more leaders, to contribute to Oklahoma's success. Bradford's success was due to the talent the surrounded him.
Don't get me wrong, Florida's packed full of talent, but they have no leadership. A person could say that they had a pretty decent tight end to compliment T.T., but one receiver just doesn't cut it.
As for Percy Harvin, he was the last thing of a leader on that team. He was nothing but a pot-head in athletes shoes. Tim Tebow may not have boasted the same stats as Bradford, but he had all the other traits. Leadership is what brings a team together. There isn't a better leader out there than Tim Tebow.