Frank the Tanks blog has a good reputation. He clearly states that his niche is more about analyzing the news that has already been reported rather than actually "breaking" news himself. But in this case, he says he has a very solid source that he trusts and had has given him accurate info before about Big-12 movement. His source says Oklahoma wants out. His blog is an interesting read.
I don’t position this blog as a newsbreaking site, but I have heard from a knowledgeable person with extensive contacts with current and former Big 12 members (i.e. knew specific details about Nebraska heading to the Big Ten and Texas A&M to the SEC beforehand that couldn’t have been simply guessed from the news) that basically had this to say: Oklahoma isn’t happy with the Big 12 and wants to get out.
http://frankthetank.me/2015/07/29/big-12-expansion-or-contraction-watch-out-for-oklahoma/
I don’t position this blog as a newsbreaking site, but I have heard from a knowledgeable person with extensive contacts with current and former Big 12 members (i.e. knew specific details about Nebraska heading to the Big Ten and Texas A&M to the SEC beforehand that couldn’t have been simply guessed from the news) that basically had this to say: Oklahoma isn’t happy with the Big 12 and wants to get out.
http://frankthetank.me/2015/07/29/big-12-expansion-or-contraction-watch-out-for-oklahoma/