I don't usually do this as I find myself defending Romo more often than not in the real world, but for those pointing out Tom Brady's end of game INTS last year, just a few things to bear in mind:
1. In the Bengals game, he had Aaron Dobson wide open and the ball hit him directly in the hands and he dropped it, which would have sealed the game.
2. The 'end of game INT' in the Panthers game occurred on the very last play of the game with no time left/no time outs.
I guess what I'm stating is that if you absolve Romo from blame in several losses with similar results as the above i.e. the 2007 Giants playoff game/2011 Giants game, then you'd have to do the same thing for Tom Brady as similar situations happened to him in his blunders.
My memory is a little foggy on the Patriots loss to Miami that ended in an INT, but I do believe it was a 'hailmary' type of situation where Brady threw a prayer. Bear in mind, Romo very rarely, if ever, throws a hailmary attempt as the last play and generally checks down as we proceed to attempt to play hot potato with laterals.
For the record, my personally opinion is that Romo was not at fault for either of those games since again, it was the last play of the game and in the second game, he led us down the field with zero timeouts in 48 seconds to kick the game winner (which we actually made but Tom Coughlin called a timeout, and the next attempt was blocked by JPP).
Again, sometimes stats don't tell the whole story as many of the other QB's attempt "hailmary" types of plays that end in INT's, which will make their 4th quarter INT rate look worse, where Romo doesn't do this too often. This is why I'm not the biggest fan of always relying on stats, although Romo's stats of 31-10 can't really be argued with too much IMO.
