Sssssshhhhhh. Don't confuse the poor man with facts.
In any event, I don't agree with the idea of a female Doctor just because the essence of the character is masculine. Having said that, I see no particular reason that the next Doctor can't be an ethnic minority -- if the Doctor can change appearance so radically in so many important ways (height, build, etc.), why not in a relatively superficial way (skin color)? It's not like the Doctor's "whiteness" is intrinsic to the character, either; he's alien, it's not like they have to preserve the Doctor's Anglo-Saxon heritage.