Examining his statistics, especially to comapre him to his contemporaries, is a perfectly valid approach to this in my opinion. Add to that, I'm not basing my opinion on statistics alone as I think that the Tennessee defense is more deserving of credit in that team's win streak.
Using Terry Bradshaw as an example of why you can't just look at stat's isn't comparable either. Use just about any stat's from a modern day qb and they would be hall of fame numbers if they were posted 20+ years ago. 4,000 yards passing meant something in 1969 when Joe Willie did it. Heck, even in '82 when Fouts was the 2nd one to do it it meant something. Today, it means very little.
However, when you look at many of the measurables of Vince Young compared to the other qb's in the league, he doesn't really stack up. Like I said, I would say that Leinart's numbers are very comparable to Vince Young's and he didn't even get a vote as far as I know. So, the ROY basically has nothing to do with statistics if that's the case and "he just win's" is total BS in my opinion. Teams win. Period. End of story. Young has made a few highlight reel plays but his team was tied or trailing in those situations in part because of the pedestrian numbers he put up during the other parts of the game.
51% completion and a 66 rating would merit "he's got a lot of work to do" if not for the hype surrounding Young. Once the league decides that it won't give him the opportunity to run free, how spectacular will a less athletic Michael Vick really be?