i'd prefer someone more informed than either of us chime in on this subject, because trusting that one single experiment (self described as a "fast first try") is like trusting people on ST: debatable.
Either way, .2 is impressive if it's at 0. Out to 8-10 degrees of yaw it's not as impressive.

furthermore, that guy isn't a slowtwitcher that i'm aware of so doesn't count.