CONGRATULATIONS! He sounds like quite the darling baby.
Ozzie was 11 weeks when we brought him home -- and he barked the first night. (In fact, he barked and whined almost non-stop for the first SEVEN nights we had him.
)
Our first Yorkie, Scruffy, didn't say a word for at least a month, maybe longer, when we first brought him home. He was SO little, especially compared to Ozzie, and his little bark was hysterical.
We started to wonder if he would eVER bark. He actually scared himself the first time he did it. (trying to retrieve a toy that was on a floor register.) He started barking at it. And every time he'd bark, he'd jump, as if to say, "Did I just do that?" It was hilarious!