Sanchez isn't consistent. That's always been his problem. Every now and then, believe it or not, he will have good games and decent QB ratings. Rarely, but he has the potential.
Tebow is consistent as gravity. He fucking sucks. Except for the drive that matters. However... his defense deserves a hell of a lot more credit than they get for even keeping the Broncos in the game for Tebow to even HAVE that last opportunity. I don't know of many teams that would still be in the game when the QB tanks as much as Tebow does 90% of the games.