I have to go with
@SoCalPatrick here. UT has been Tennessee since I knew what the game of football was about.
Think about this for a minute...you're a kid, growing up following Bama. When you heard UT was it EVER about Texas? No. We're in SEC country, right?
Historically Texas probably has Tennessee beaten in a lot of different sports. Historically, UT has been Tennessee for my lifetime.
Another thought...when Bama met Texas in 2010, it had been what ...right at 30 years since the two teams had met? There's a 30 year period where UT was Tennessee: every season.
Just like a person can't just pick a nickname, a newcomer can't just decide "our acronym rules." Screw Texas.