yup - typical Yorkie behaviour.
She is so happy to see you. My two go crazy when we have been shopping or to the doctors and they have been left alone in the house for a short while.
Even when it is just my husband who has been out of the house as soon as he comes home they go crazy, you think he had been gone for hours instead of a very short time.
Guess I'd be worry if they didn't act that way