Brad's speech is starting to take off. He has more single words than I can count, including words for each of his foods and books. Also, he uses the verbs "open", "help" and "go."
And he even said "mama" yesterday. Not spontaneously, but after I coached him. I'm still waiting for him to say "mama" spontaneously. I won't say that my feelings aren't hurt that Brad asks for his trains by name ("Thomas" and "Percy") spontaneously, but not "mama".