that BYU has the toughest first 4 game schedule in the country this year. If they were to go undefeated and win a couple of them in blowouts and those teams are 3-1 after 4 games, then the argument SHOULD be that BYU is top 5. Of course, the schedule after that would have them be leap frogged by the top teams in the P5 conferences as they play better teams and we play worse teams.
As long as we are wishing then I say they would be ranked #1 and land playoff spot with a natty to finish the year.