With gay people, all possible partners are also possible competitors. Therefore, a larger pool can only be better because there is a higher chance of someone being appealing at all. By your logic having exactly two lesbians would be ideal, because no one could compete with them; but without the dumbest of dumb luck, they'd be poorly suited to each other.
The variance grows more slowly than the number, so the largeness of the pool probably doesn't make much of a difference above a lower bound. 10,000 lesbians are probably in less dating trouble than 1,000,000 men competing for 900,000 women. I could be wrong.
2:45:24 PM Katja Grace: The main thing that puts me off in online dating profiles is lack of ambition to save the world
2:45:35 PM Katja Grace: Or do anything much
2:48:03 PM Michael Blume: *nods*
2:48:07 PM Michael Blume: this is indeed a problem
2:57:55 PM Katja Grace: Maybe there is a dating site for smart ambitious nerds somewhere
2:58:25 PM Katja Grace: Need to set up lw extension perhaps
2:59:02 PM Michael Blume: haha, yes ^^
3:00:40 PM Katja Grace: Plenty of discussion on why few girls, how to get girls, nobody ever says 'oy, girls on lw, want to get together some time?'
3:01:14 PM Michael Blume: somebody really should say that
3:01:34 PM Michael Blume: hell, I'm tempted to just copy that IM into a top-level post and click 'submit'
3:01:48 PM Katja Grace: Haha dare you to