This is risky, because then you'll have some men and women getting P'O'ed and blasting Turbine for sexism, nihilism, and whatever other ism they can come up with.
I forget what indie game I was following awhile back, but the dev (the only one) mentioned that males and females would have stat adjustments based on gender. The resulting thread was not pretty, even by the standards (such as there are) of the internet. The dev backed off, and the two were made equal.
My own game, the only differences are in diplomacy checks for various NPCs. Some are more inclined to deal with men, others women. Some prefer their own or some few other races over some others. That's about as much risk as I'd take, and then I'd expect to get blasted for sexism and racism even then. With no statistical differences between the genders, and none of the races being closely correlated to a real world "race".