BYU hasn't played a single game against a ranked team. They are in no position to be arguing about strength of schedule. Utah may be playing bad teams, but at least they are handling them the way good teams should. Heck, they are handling them better than Alabama and Wisconsin handled the same teams.
BYU, on the other hand, just got blown out by a crappy team. They only have 1 win, which was at home against a crappy team. And even then, they trailed at halftime and could have lost that game too.
Utah is blowing these bad teams out. Sure the Pitt game was close, but Utah still won (and it would have been a blowout if it weren't for stupid mistakes- dropped kickoffs, blocked punts, etc). And Pitt is better than anyone BYU has even played so far (Pitt won 44-17 today against a crappy team, with Dion Lewis sitting out because of an injury).
Pitt will be in a bowl game this year- like Air Force and Florida State. Pitt will likely be in a BCS game when they win the Big East. Utah beat them. Teams of this caliber (and lesser) are blowing BYU out.
So it's stupid for BYU fans to be saying anything about strength of schedule. Not only is Utah winning their games (by a huge margin) but Pitt is better than anyone BYU has played, and BYU is getting blown out in every game.