But do you consider girls good gamers?
I do. Gender has nothing to do with it, its the skill you put it. To say you dont is like saying a man cant cook/clean because he has a Y chromosome.
Do you think they are as good as boys?
Again, depends on the skill they want to put forth. Casually, most likely. Hardcore... well, I'd say there's a lot less who are on that level, since most Girls are sorta just getting into heavy competitive gaming en mass. But if you want a solid answer, yes.
Do you mind facing a girl online?
No. I actually welcome it. I find it refreshing really, but thats just me. They seem to not get so into the "Oh, I just fucked you mom last night, just like I'm fucking you in this game" kinda talk that boys like to get into. I find the feminine touch and civility rather enjoyable.
I've met girls I beat, met girls I cant beat. Its less number then men, but thats just cause I dont think girls play as many games online competitively AND reveal themselves.