[DoreenMichele]

So, the excess of single men may not be that much excess competition if a notable percentage of them are dating other men, not women.

[MlEngineer]

Of course, but this is not the 1970s, and young males aren't moving to SF specifically to practice an openly gay lifestyle in an otherwise intolerant nation. It's unlikely that the hordes of male engineers, relocating to South Bay / SF for professional reasons, are substantially more likely to be gay than the women.