Of course it's important. My point is, what the tape measured shows is not necessarily better than auto REQ's measured value that is based on time delay but displayed in distance (ft, meter). If both happens to be the same, it's accurate and also look good, if not the same, I would go with REQ's at least Audyssey XT32 and Anthem ARC that I know I can trust. We are dealing with Acoustics in room, time delay based "distance" is better than the physical distance, thought quite often the measured values are the same or almost the same. Again, for subwoofers, the distance could be a little more different.