I doubt he uses the jumbo packages on 4th and short like so many coaches who have fallen into that trap. The one place the read option has an advantage is in short yardage with 4 wides and the defense spread. The difference with Kelly though isn't whether he goes for it on 4th and short as many coaches will. He'll go for it on 4th and 4 from the opponents 40. He'll also take advantage of the 2 point conversion. If a team can average 51% conversion, it's points on the board over a season.