I'm willing to bet the 'source' of this 'preliminary discussion' leak is Oregon. Back in the day, Mizzou did the same thing.
My skepticism comes when you start looking at the revenue. No future expansion gives the current schools more money -- with the exception of one that involves Notre Dame. So unless it's a situation where schools are auditioning to join the league with the Irish, take it with a grain of salt. And for what its worth, If ND joins the B1G with somebody else, my money is on Stanford, not Oregon or Washington.