Denver is still a paper tiger. The minute they face a team that scores points, they'll lose.
I'm pretty sure the Raiders and Chargers both score points, and they both lost at home to the Broncos in the last month.
San Diego was putrid on offense today. They had several opportunities to score points in overtime, but couldn't sustain a drive. The real story of Denver's lucky run is their defense and the ineptitude of their opponents, not Tebow. Denver's offense has been totally mediocre, but they have been winning games because their defense has kept the score low. That's partially because their schedule has been easy. Detroit (who killed them) is the only team they have faced recently who ranks in the top 10 in the league in points per game. The others are:
San Diego - 13th
Oakland - 15th
New York - 16th
Miami - 22nd
Kansas City - 28th
Denver's style won't work against teams that can score 20+ points with ease. As soon as Tebow is forced to carry the team, he will be exposed as the liability that he is. People are being way too results-oriented and not looking closely at the performances. He's been struggling mightily in the passing game despite an ultra conservative gameplan that calls for fewer passing attempts per game than any other team in the league. He will be exposed sooner or later and is unlikely to even be a starter in the league two years from now barring massive improvements as a passer.