There are some differences with the last 3 years though.
2005: Texas had everything to lose, a&m had nothing to lose. Not to mention, they trot out an option based attack, with a QB had not started one game in his life. Texas survives.
2006: Colt was not close to being healthy, the backup QB had already signed his transfer papers, so mack was not willing to play him, leaving the team without and offense.
2007: We had a defense that lacked any playmakers. Obviously there was some talent, but no one on that team stepped up and the defensive scheme was somwhat shaky.
2008: Team remembers the previous 2 losses. Realize a lot of the country will be watching the thanksgiving game on national TV. They also realize the only way to impress voters is to beat a&m by 40+. If Texas has head to head higher margin of victories against similar opponents, it should factor into something.
Oh, and Will Muschamp will not let aggie score more than 6 points.