Every game Texas plays is a "trap" game. Kinda like UGA, the other guys want to play their best, and see it as a chance to knock off the big guy and really make a statement.
Texas certainly doesn't have the panache built up yet to expect the other side to lay down and panic. They're gonna get the best shot. If they don't match it early, they give the believers a chance.
How many times last season did I beg Texas to land that 3rd or 4th score body blow that sends the opponent's offense into a panic game plan? Texas just couldn't finish. Either the defense would leak a FG or a TD to keep it manageable, or the offense would post a 3 and out. If Texas is up 21-0 at the end of the 1st quarter, ISU realizes the dream isn't coming true. The players start to press. The game plan picks up a tempo it can't handle. Texas has an easy rest of the game.
Conversely, a 10-7 score, particularly with a turnover or something, keeps the blender-birds giving it their all. They're flush with energy and belief. The game becomes a grind where Texas has to keep from mentally breaking as well.