"What good does it do a Texas social conservative to elect a GOP candidate like Mitt Romney?"
I'm not sure what your point is. Where he differs from Obama, Romney's positions are nigh-universally closer to those of Texas social conservatives aren't they? What is the biggest issue for Texas social conservatives? Abortion? What office that a Texas social conservative votes for has more impact on the future of this issue than POTUS? Would Romney's Supreme Court nominees presumably be better or worse than Obama's from the POV of Texas social conservatives?