The major problem I have is the designation BCS vs. nonBCS is sloppy. Yes, by and large BCS conferences are better and more difficult to navigate top to bottom, but they all don't carry the same degree of difficulty.
For example, I agree if BYU had a schedule similar to an average Pac-10 team. Their record would be significantly worse. That schedule IS a grind. Consider that every Pac-10 team plays 9 conference games and most play at least one VERY good nonconference game. No Pac-10 team has finished the season with less than 2 losses since they went to this kind of schedule.
However, if BYU played a Big East schedule of 7 conference games, half of which were Conference USA teams only 2 years ago, and the remainder of the schedule cupcake city against 1-AA opponents and service academies then their record would be much the same as it has been the last 2 years.