They do if they are about to strike a pedal!
And as for high PoE, the drag is noticeable on any section of coasting, especially coming off a much faster hub. I am sure your expectations adjust, but jump on a Star ratchet 36 DT Swiss and coast on a gentle grade next to your buddy on his i9s. You won't for long, because you will pull away very, very quickly. I'd rather have the faster, more reliable hub that makes a difference every ride than the one time in every five rides that I could use faster engagement.