That's the conventional wisdom, and for them, it would make the most sense...
The dissolving of the Big East Conference in basketball with the planned exit of the so-called "Catholic 7" is creating some discord with the inbound football-playing schools- and now it looks like Boise State is thinking about jumping back to where they were.
Under the new post-season system, the Mountain West has as much stroke as the Big East does. The Big East's TV deal is in a large amount of doubt and discussion since it would take place starting in 2014- the season in which a lot of the schools are looking to leave, relocate, and/or not hang out with the Big East anymore.
Evidence of concern is hyah...thanks, KIVI-TV in Boise...
At the same time, it appears that the Big east is reaching out to UNLV and Fresno State to join if the western additions turn into abstentions. The idea of them joining seems somewhat far-fetched since there doesn't seem to be any kind of added benefit. San Diego State is still in play since they haven't decided to go back to where they were or not at present.
Meanwhile, when was the last time you heard about Boise and Washington squaring off in a defensive battle in Las Vegas...???