Um, no. He has proven on several occasions that he does exactly that.
Example: After deservedly earning a third string spot on the team after preseason, Tebow told interviewers all about how his childhood dream of becoming an NFL QB was "grabbed away from him" and how he should be the starter.
He said that after he played in 4 fucking games against pitiful opponents the year prior. He might as well have said "I feel completely entitled to the starter spot even though the coaches noticed I throw like a middle school second string". He has no vision, no accuracy, and terrible habits, but the reason I strongly dislike Tim Tebow is surprisingly because of his attitude.
Who cares what he did at Florida, this is a professional league. Players earn their spots and the respect that goes with it. Watch him in the huddle and compare that to other young QB's. Even Ponder looks like he owns the Vikings, like a leader when he's in the directors seat. Not tentative and unsure.