Actually, what would be more interesting is how each area in the state compares. I guarantee you, Dallas is DEFINITELY not Austin in personality. Those two might as well be Red/Blue states, as dichotomous as they are.
I live in the south and I totaly agree because I'm not from here that these people are neurotic and extroverted (everybody is always talking to anyone and everyone about nothing). Living here is all the validity I need : P