TCU had a great game plan and they executed it well:
Their D line held up and let them get an extra db on the field. They didnt give up the big plays (other than the 86 yarder) by keeping receivers in front of them. The D got pressure more and more with 3 or 4 guys.
Offensively TCU committed to running the ball, which opened up the passing game. It wasn't flashy but it got the job done.
I think Okie Lite's mindset from there previous games hurt them. The broadcasters kept talking about them being calm on the sideline, not panicking. I felt like they didnt handle adversity well and it threw them off. Once they developed a sense of urgency, it was too late. Plus they were dragging ass on defense by that point and couldn't make stops.