Which is a lot. Relatively speaking. It's way, way more than zero.
I suppose we were expecting a big moment when Elliot said his "first word", but that didn't really happen. He's been using some extremely reasonable-sounding syllables (e.g. mamamamama) for months and months. But he's been using them in pretty unreasonable ways. You couldn't let yourself get too excited about how he used amamamamama when Sarah arrived, because he would also talk in very similar terms about a blanket, a paper bag, or some applesauce.
But he's been improving his aim. amamaomamama usually means Sarah, though sometimes it means me. K'hhh and kiiii and k'uh indicate key. (Or toy, or object.) Da might mean me, though it's vague. It sometimes means Ada. The crown jewel, though is tuuf, which he says while pointing to his teeth (which hurt him right now, a lot).
Right now Elliot is standing in my shoes, trying to wear them.