The running game looked a lot better in 2013 than in 2012, undoubtedly, and I'm sure Callahan had something to do with that. Of course, we also had Travis Frederick instead of guys off the street this year, and more continuity at the other OL positions. The goal-line running game looked a lot better this year too than in years past, but I'm not sure how much of that I'd attribute to scheme. And that's the problem: you're claiming that the improvement is mostly about the change in scheme, but I just don't see anything that supports that.
Romo was sacked 35 times in 2013 (in 15 games), 36 times in 2012, and 36 times in 2011. I don't see the big change you're claiming. Also, how in the world did Murray manage a 5.5 ypc in 2011 if there were "no holes to run through"?
And BTW, you're the one who said, "Here's a stat that can't be argued." And now, after I've successfully argued it, you shift to, "put the stat sheet down"? A little consistency would be nice.