Peterman hasn't exactly lit it up against 2's and 3's. So who are you saying is the best at the QB position? The thing in Peterman's favor is that he is a rookie. Sometimes the saying, if the battle for the position is close then give it to the rookie is true. Sometimes it's not.
Also, consider that the last pre-season game we just saw from Taylor was probably the worst we've seen ever outside of maybe the fourth quarter of the Oakland game last year. Basically even with that terrible film, there is a good chance that was an anomaly. Preseason game #3 will be interesting but at this point I think Peterman has to look a whole lot better to take the job from Taylor no matter how bad Taylor looks in the next game. Now if Taylor's first two games to start the season are very similar to his first two games to start the season last year then I think we have a legitimate argument to make that Peterman should get a look.