Probably. I'd be happy to have a gay son someday, but having a lesbian would probably freak me a little. Not to say i wouldn't love her just the same as i would should i end up with a straight one, I just think considering the fact that I have about a trillion issues with myself for possibly being(denying the fact of) bi, I'd relate more to a straight daughter. Then again, who knows? Maybe a lesbian daughter would be easier.
But yeah, I think a part of it has to do with exposure-- I have a few gay guy friends but zero lesbian friends. And my parents are severely homophobic. I made a LGBT poster once for school, my mom found it and thought I was gay. She disowned me until I convinced her that it was just a poster. But yeah. I'm rambling