It seems like a "bit less accurate" is a misnomer here. If you can successfully employ this technique, and use calibrated test equipment to measure it, you hav

It seems like a "bit less accurate" is a misnomer here. If you can successfully employ this technique, and use calibrated test equipment to measure it, you have in fact demonstrated your accuracy in recalling the pitch of notes, also known as perfect pitch. The means of achieving this recall do not in any way affect the accuracy of the results, because the results exclusively speak for themselves.