Winning does require more than a game plan. It also requires the athletic ability to execute the game plan. ISU is going into the NCAA as a lower seed (probably 8 or worse). Thus, they are likely going to playing a team (or teams) with good athletic talent who can try to do what UT did.
This is just flat out wrong. Coaches don't have time to be concerned about what is going on in other conferences during conference play. Once tourney opponents are announced, the coaches will grab video of the latest games and try to learn what the can over the next few days. Until ISU should happen to run into another opponent from the Big 12, any tourney opponent will be relying heavily on recent game video when devising strategy.
I'm saying everyone can get film on everyone, everyone has had a game plan executed against them that has worked, and just because one worked against us does not mean that the team we play will have the same exact assets to use that UT did, or that we will respond in the same way.