I'm not isolating two games, but Denver not only had many important injuries early on, they also had a bunch of new guys on defense, who obviously are getting better the more playing/practice time they have under their belt and let's not forget that the defense was put in terrible spots frequently by Ortons turnovers early in the season...that's one of the things I give to Tebow: Although the offense still doesn't move the ball very well, at least with him under center they significantly cut back on their turnovers.
But that doesn't change my opinion, that this team has been carried for most part by the defensive and special teams play since they were even responsible for some key scores in half of those games (MIA/NYJ), "Tebow won"...