First of all, I really liked knowing that I had a one in three chance of a woman, Jessica Livingston, reading my application.
I liked how the application felt like a college application; they judge you based upon your potential and what you've done in your circumstances, not like an investor who says: "What experience and traction do you have?".
I totally trusted PG, Jessica + TLB to see my potential and tailored my application to the rubric they stated on the website--looking for outstanding "outside of the box" people.
Having entrepreneurs, who may not be as used to thinking outside the box of "who is a good founder?" will be more biased towards founders like themselves - i.e. male coders.
This comes as a very sad surprise to me. I have a feeling I'm going to be treated as I usually am by the men in technology - which is an outsider. I know that there are VERY FEW female YC founders and I know that having male coders looking at my application is going to totally work against me, if for no other reason than they don't relate to me.
[edit: I sincerely apologize that my comment has generated so much heat. I wanted to raise a concern, I'm sorry this got out of hand.]