It's Official...

... Jack's first word was daddy. Today Jack was sitting in his high chair when John came home from work. Jack smiled and said, "Dada" as though he'd been talking for ages. It was really sweet. For awhile now, we've thought that Jack was saying hi as he waved, but this is the first time he has assigned a word to a person or object. How long do I have to wait until he says mommy?