I agree with most of what has been said here, in fact if someone was using this schools technique I would be wary of signing them off.
One bit I do disagree with though is
Don't forget, though, that to achieve the POH landing performance, you will need the correct speed/height at the threshold, and the throttle at idle from there on.
, nothing I can see in the POH that says this and my understanding is that you leave power on during the flare to give some slipstream effect over the tail, thus increasing the effectiveness of the elevator - one reason you use a higher speed on a glide approach.