Tebow wasn't better than Chris Leak in my opinion. They were a good 1-2 punch when Tebow was a freshman but Chris leak won the NC as well. Chris Leak did struggle when Urban Meyer came in and tried to change him into a dual threat rather than a pocket passer that he was.

"Leak finished his career in Gainesville with 11,213 passing yards and 88 touchdown passes. He's the school's all-time leading passer."

from wiki:

Leak led the Florida Gators to their second consensus national championship with a 41 - 14 victory over the Ohio State Buckeyes on January 8, 2007, taking home the offensive Most Valuable Player (MVP) award for the game. His performance was solid throughout the BCS championship game, completing his first nine passes at the start of the game, and finishing with twenty-five completions in thirty-six attempts for 213 yards and one touchdown.

I agree about Leak, but, caveat it by saying he was a three year starter when Mullen got there, so Mullen didn't get to pick his no. 1.