I think my son is starting to pick up on the signing! He knows our sign for "come here" and will automatically raise his arms and I know that he understands when I do "milk", "drink" "eat" and "more". I think he's starting to do "all done" to us when he's finished eating.
I'm excited, I can't wait until he can do more since I know he's fustrated with me sometimes because I can't guess what's going on.
Just wanted to share.