If you believe Texas is majority pro-choice, I have a bridge to sell you somewhere.
Frankly most people, in analyzing Texas, underestimate its social conservatism and overestimate its fiscal conservatism, simply because residents of the state don't like taxes. Texas is roughly in the realm of Oklahoma, Louisiana, Mississippi and Alabama in terms of its social beliefs.
Seriously though, adult polls are not to be trusted in the Texas, since nearly one-third of the adult population aren't registered voters and the only time in the elections that even one-half of the adult population votes (sometimes) is in the Presidential elections. Tends to skew the sample.