My sense is that most of the YC applicants are not just male but under 30. Is this incorrect?
I am one of the mentors in the group and participated in TechStars at the grand old age of 38 and have two young children, and I can say that our group would be happy to work with applicants of any age. I don't believe that Christine's comment is meant to indicate our support of women within a particular age range (or whether they have or plan to have children) -- it's a reference to what we believe the median age of YC applicants are.
Your comment does make me wonder, however: what is that number? Does anyone know?