I think most people think that the %s are higher. Again, the reality is we have a very mediocre defense. My purpose in quoting points per game was to refute the notion JMonty had that we needed to score 30+ per game in order to win. That's not true, and the stats bear it out.
I'll also say that I don't think scheme is our problem. I have watched all but the Pitt game this year, and what I have consistently seen is that our main weakness is tackling. Way too many times I have seen us make contact before the markers on third down and still have the opposing O make the first down. I haven't researched the stats, but I haven't seen us give up a lot of plays over 20 yds. Of the few I remember/know of, 2 were deflected passes that were caught. Most of the plays that have burned us are in the 6-10 yard range, most coming after initial contact by a GT defender. The same goes with our pass rush. I've seen us whiff an awful lot on the QB, when we were in the backfield with a shot. I am not sure how much of this is due to bad angles or bad form. This is what I see holding us back so far. (Again, I haven't watched the Pitt game yet, so my observations may change somewhat)
How much of that is coaching vs execution? I really can't say. But I would tend to believe that the coaches are aware of and trying to correct the tackling deficiencies, just as CPJ was aware of and correcting the OL deficiencies from last year. That's why I am not, yet, on the fire CTR bandwagon.