I don"t see the difference - whether the player be male of female, they"ve given their buy in, they have chips, and they are occupying a seat at my table. They will be dealt two cards, and could bust me or double me up. Are women weaker than men? Ask Margaret Thatcher!!
Personally I always like to play at a mixed table (in live games) as the ambience is generally better, and the neanderthal men are often better behaved.
And as for online poker, who knows whether your up against a man, women, or something in between!!
Should there be Women Only tourneys? In my opinion, NO! This just advertises the divide! If equality is the aim, why make a point of making an environment for women only? To counter this and to retain quality you would have to create a men only tourney, and that would probably land us all in the EU court of human rights!!!!