The under-30 crowd in the Prop 8 voting were more tolerant of GLBs than older folks, and I suspect the general US population for that age group would tend likely to do the same for Ts. Also, students know their teachers much better than their parents know the teachers, so students are more able to look at competence rather than prejudice. Also, many modern parents have a tendency to overreact to any perceived danger to their children, whereas kids don't usually have these fears (they are usually more afraid of homework, administrators, bullies, and family).
These are, of course, tendencies. Some older adults (even parents) have their act together.