Correlation does not imply causation, but it's difficult to ignore the fact that there was no advantage for the Pats. In fact, in this particular game, there is a negative correlation between the use of under-inflated balls and performance. The Pats scored 17 points in the 1st half and 28 in the 2nd after the issue was rectified. They played significantly better.
Even more interesting is that Indy played better when we were utilizing under-inflated balls than when the issue was rectified and we were using regulation inflated balls.
Based on this, you could make a case that the point differential would have been even larger had we used properly inflated balls the entire game.
Belichick should be praised for intentionally handicapping our team so as to not drop 70 points on the Colts.