I couldn't tell from the article or the video what the latency of this thing was. What is the error rate in interpreting his states of mind and translating the

I couldn't tell from the article or the video what the latency of this thing was. What is the error rate in interpreting his states of mind and translating them into commands to the toy? The demonstration would have been much more impressive if he could show a video of the robot performing complex maneuvers from thought control.