Uhh...no... Texas couldnt care less about Okie State as a "rival." They play each other every year but if you think there is some rivalry angle here you are sorely mistaken.
They have had some interesting comebacks with Texas falling behind, but Texas is 11-1 v Okie State since the Big 12 was formed, 10-0 under Brown, and my best recollection is only 2 of those games (including last years in Stillwater) have been within 2 touchdowns.
Okie State is 5ht in the nation rushing-but Texas-agaisnt far better opponents overall-is 2nd in rushing defense. Okie State will have some success passing but will have to find somebody other than Bryant to do it. They will score some points. Both teams have terrible pass defenses - Okie State will not stop Texas defensively unless McCoy makes serious mistakes. And Texas is 3rd in the country in fewest turnovers.