Yes, that's true. But I don't know that you're actually scoring a point here, because I do believe that if you take a group of all gay men, and introduce a woman, the group dynamic will change. Not the same change as when you have a group of straight men, or a group of mixed straight and gay men, but it'll change.

And on top of that, I've heard some gay men complain about straight women in their spaces. That's just another example of this phenomenon.