Also, you know what? Kudos to Russell T Davies. He might have been initially sceptical about being able to sell a female Doctor to the audience, but he absolutely laid some of the groundwork too.
In the same series in which Moffat brought in River Song, sonic screwdriver and all, RTD went on to write all three major companions of his as Doctor figures. Donna saving the day as the DoctorDonna. Martha coming face to face with the decision to destroy her planet and her people, or let the universe perish. And Rose travelling through different realities, her name a secret, strange words on her lips, with a plan to save the world.