Again, he was talking about yardage, not points. In fact he specifically mentioned that we are still in the top half of the conference in points allowed, despite the Army game here:
"The nature of what we do on offense, we’re probably never going to have a top three-or-four defense, if you look at yardage. If you look at stop rate, our defense was one of the best in the ACC going into last weekend. If you look at scoring defense, we’re still in the top half, even after giving up 56 points. Our yardage numbers are never going to be in the top five. When you play the way we play on offense and snap the ball quickly, play counts are going to be up. If play counts are up, yardage totals are going to be up."
This is from Les' transcript and I switched a comma for a period to make it clearer. (hope I'm not crossing boundaries by using this quote)