It isn't so much a commentary on OU vs these other schools as it is the other P-conferences vs the Big 12. Obviously OU has some pedigree on the national level. I just think the Big 12, for whatever reason, gets sand kicked in its face more often than not, it hurts OU (and UT), thus they are departing for greener pastures.
I think people are viewing how the Big 12 gets treated vs. the SEC and Big 10, and think that it's an anti-Big 12 bias in the media. The media does not think the Big 12 is great, but it completely knows that the PAC 12 sucks. Utah is pretty clearly the second best team in the league and ASU is 3rd. Utah is getting 34 votes. ISU is getting 21, and ASU got 1. Meanwhile ACCs Clemson got 3 votes. All these teams are 6-3 BTW.
So relative to the ACC or PAC there is no anti-Big 12 bias in the media, at least not in any real way that can be shown with evidence. The media loves the SEC and Big 10, and the other three conferences are a step down. But the media also votes ISU ahead of Clemson and ASU with the same records.
So of course the media is going to view the SEC better than the new Big 12, because it certainly is. They will view the Big 10 as being better, but the Big 10 has always been drastically overrated by the media.
But if people think the media is suddenly going to flip and start thinking the PAC and ACC are part of a "big 4" they aren't. The newest AP poll that the media votes on has 5/12 new Big 12 teams ranked, 1/14 PAC team and 3/14 ACC teams. Utah and ISU are close to being ranked. Clemson and ASU got a couple straggler votes probably by their own media people.