I know of dozens of incredibly talented potential male founders who applied with killer ideas and were rejected. Seriously.
> I think it is very likely that YC has a strong bias towards men, which this data certainly supports.
Why do you think it's very likely? What data supports that. As one of the other commentators already pointed out, the percentage of YC founders that are women is about equal to the percentage that apply. Saying that the "data support" the argument that YC is biased when there is such an obvious alternative explanation (namely, that there are less female founders) is disingenuous.
> since YC is a for profit business they are making economically sound decisions.
Wait, what? Are you saying that since Silicon Valley (I'm guessing you mean investors in this context?) favors men, YC intentionally (and consciously) chooses to fund men in order to increase the chances that YC founders raise subsequent rounds of financing? That's crazy talk...
> saying any fault lies with women is really unfair.
I don't think anybody is "faulting" women. They are just stating the facts - there are less female engineers, and less female YC applicants.