Anonymous wrote:17.5 boy: he went from saying 5 words to repeating everything.
I would not worry OP, most kids in DC's play group say very little if anything. My child does not say much around other kids as well, so you would never suspect him in being chatty

OP here, this is interesting. DS is very "chatty" too, when he's home. By chatty I mean, he just babbles away, as if in real conversation with us. He repeats everything, but he only has about 40 single words or so. He has his moments at daycare, but is mostly quiet, just like the other kids in his classroom.
Thanks for sharing your experience!