Abigail may be a girl, and I have always heard that they talk faster and more than boys. I've also heard that subsequent children talk more. I've also heard that subsequent children talk less. I've heard a lot of things.
Abigail has been way slower in the speech department than the boys. She signed like a mad woman, but just sort of refused to talk. Until recently. During the last few months, her talking has taken off. We are so enjoying watching her words come so rapidly!