BYU fan here. Not psycho like the some of the other ones that posted earlier. I am normal, drink beer occasionally and don't throw a book of Mormon at every attractive woman I see.
I am almost inclined to say no no pixie dust. BYU often hangs with talented teams, Oklahoma, Texas, the Pac 12 teams they have occasionally (but not always) walloped in the Vegas bowl. The problem with BYU is not talent it is coaching and that is why I am hesitant to predict a BYU win over any team with talent.
Bronco Mendenhall is one of the best defensive minds in the game. His teams have shut down high powered running attacks left and right in the past 8 years. Occasionally they have their blunders but for the most part BYU is hard to run against. There is a new coach calling the defensive plays this year so no BYU fan or anyone else really knows how the defense will perform. They have the talent to shut down running games, but the defensive coach is unproven. If Bronco was calling the plays it would be hard for UConn to score. That is not the case so I see Pixie dust potential.
The real problem is Robert Anae and the offense. He instituted a new scheme last year that is called Go Fast, Go hard. In reality it should be called Go Fast, Don't Score. The offense has not proven it can beat a team with good coaches and talent. Texas had talent but the coach was a joke. Even if the offense has proven that, with Anae calling the plays it is impossible to predict one over the other. Potential Pixie dust here.
Anae is terrible at play calling. Watch how many times in this game he will run it up the gut. Anae believes that you have to make something that doesn't work, work, in order to win. He could pass all day and night on you, but if you shut down the run, he will immediately switch to the run game to prove that he can run. It doesn't matter if you have the girl scouts playing corner and safety, if you can stop the run or the pass, that is the exact place Anae will try to attack you. There will be at least four 3rd and a mile and he will try to run it up the middle. Guaranteed Pixie dust here.
I don't see the BYU Offense scoring much besides field goals. I may be wrong but I wouldn't be the only one. I do see the Defense stepping up. BYU won't cover the spread and UConn keeps it close. 16-13