SSD: Have another look. The instructor's hands, initially on his knees, both move on to the controls as he applies power. He is in control from then on, albeit with the student still holding his own stick and throttle.
MJ
Ps. Isn't the Harmony an AT-3 derivitave?
Perhaps some AT-3 instructors can comment on the directinal control available when full power is applied at very low speeds?