It looks to me like the robot just exhibits less motion in general. This might be because (as far as I can tell) the authors optimize only to match a set of static poses, not for physical or perceptual realism of motion.
I often wonder what will happen to us, to our human psyche, to the media, when that threshold is crossed and we no longer know if an actor (in the objective sense) is human or not. It terrifies me and yet I hope I live to see it.
I think this has just started to cross it. It's not perfect, but it's damn close. Of course, if they would have opened the eyes, I would likely think this was weird as hell.
What's interesting about this is that this was in fact a dream that Disney himself had, in the last years of his life he was very focused on Audio-Animatronics: http://en.wikipedia.org/wiki/Audio-Animatronics
Is motion capture not capable of recording full lip movement? The facial muscles look correct, but the lips are dead. For instance I noticed the 3d mesh lips don't pucker outwards when saying words like "you"