It's all of it, their entire attitude that just being one of them makes you special and great. Their coaches know that no matter who they sign in recruiting those players will be pumped up as diamonds in the rough and that people should watch the tape. If they sign talented headcases then everyone else is just jealous. They can't lose with A&M media as long as they're still the coach. Same for their players, they are immediately anointed as great when they sign or transfer there. There is no motivation to prove yourself because just being there makes you a hero.
Compare that to Texas. Yeah it's dumb but the fact that it's a meme for us to welcome new coaching hires with an immediate thread to fire them is the exact opposite. We question our coaches and players constantly. I used to worry about posting these facts publicly but A&M people are too stupid and proud to listen to Longhorns anyway.
When you get to Texas our fans start to demand that you prove you are good enough to be a Longhorn. Great players (both talent-wise and as teammates) use that motivation to earn that right. When you get to A&M you've already proven to their fans that you're a hero, the only motivation is to talk shit about how awesome you are just like they do and they'll never question you. That spare OL Zuhn was getting love all week from those yokels for talking shit about how great A&M, Kyle Field, and their fans are. Actually playing football well isn't even a concern.
Billy Liucci has made a lot of money by telling them they have better coaches, better players, and better recruits than Texas every year for 30 years. Yet they're too stupid to wonder why that never produces better results. They will never be great because they will never change. If they actually catch lightning in a bottle someday it will be short-lived because the hero worship will just get worse. Does the name Kevin Sumlin and the phrase "plug-and-play offense" ring a bell?