Iowa St also beat 7-5 Iowa, but other than that no wins over P5 over .500

I don't think that makes TCU a paper tiger though. Just the reality that most teams only play 1 P5 OOC these days. And some of those teams will inevitably be bad.

So you'd expect maybe ¼ of the conference to get a quality P5 OOC win. And honestly, it's only that high because the CFP rewards good losses more than the BCS/AP used to