Well, I don't know about that completely, burm. The highest pct. of his INTs did come when his team was ahead by 1-7 points, or down by 1-7, more than half, so that could be accurate, but I don't think it can be said with any authority. He did throw 4 INTs in the red zone, although none within 10 yards.
My biggest problem with him is (a) beating up on inferior defenses, while coming up small on higher ranked D's and (b) sailing passes over his receiver's heads. It is amazing, IMO, that he didn't throw more INT's doing that. He got lucky, because generally overthrows like that result in picks.