Well I love the mathematical approach to determining V's gender. However I feel V is female based on a different methodology.
- In strip 123 Haley decides to room with V as opposed to any other party member. If the party was all male there would be no reason to chose V. In fact Haley would more likely have chosen Elan to satisfy her hidden crush.
- You could also make the case that since Pompay is male V would be female. Not only would Pompay have a gender identity, but he would also be the opposite gender. I will admit that this is argument is weak.
- In strip 335 when V explains her hypotheis involving Belkar's brain, all the given examples under the "lust" catagory are female. If V was male there little worry about Belkar lusting after her.
- In strip 385 a disguised Sabine goes to a Azure City bar and starts asking V "Why are all men such pigs??" I don't know for certain but I can't imagine a women going up to a man and asking a question like that. That seems more like a women to women question. Admittedly I have little to no experience with bars, drunks, or vexed women.