Maybe a little. I wouldn't know for sure unless I was a psychologist.

IDK if any more than other groups, but I do come across a lot of gays who say they wouldn't date asians.

I don't necessarily think it's racism. I just think that it's discrimination. Many gays are very disrespectful to transgenders and drag queens. I also think that some gay guys can be pretty judgmental themselves.

But saying when there's non white folk around 'some guys prefer/like certain ethnicities...' (personal experience) is just.... moment. It depends. You say that, but society places obsessions on the white ideal ie skinny ladies etc and straight hair. When a lot of people never have those qualities. I mean at the LGBT in uni in the UK, I'm the only non white person there. There are issues IMO. There is a lot of 'I'll only date etc...' in the world full stop, but in the gay community, I think it's worse.