I know that I often don't see things like others do, but I think the real improvement in high POE hubs is in constant curves or switchbacks at speed. It is the one case where the rider is attempting to maintain a high rate of speed with pedaling, but cannot pedal much of the time because of bike weighting and obstacle avoidance. When suddenly taking a stab at the pedals between apexes to keep the speed up, that is when the lost motion of more degrees of engagement causes a loss in speed, and often a harsh engagement.
On the other hand, the much touted "ratchet" in technical terrain ... I have no problem calibrating my response to varying engagement degrees in a few seconds of riding. Yea, a high POE is likely better from a timing and propulsion standpoint, but really can't tell.