Az, I have industry standard reference grade audio measurement gear and I have been measuring loudspeakers for more than half my life. I would estimate I have taken well over 200,000 measurements at this point and I strongly doubt anyone at Audyssey has taken as many measurements as I have - probably not even close. Even with the equipment I use, I often question a particular measurement because it does not look right to me. Mic positioning, speaker positioning, room modes, noise, humidity, grounding, equipment irregularities and various acts of nature can all dramatically influence a loudspeaker measurement. It takes years of experience to be able to look at a measurement and say, yeah -- that looks right and is consistent with what I am hearing. It is simply not possible to objectively determine that a measurement is correct without some form of human interaction. There are simply too many variables that can influence a measurement...
When the NRC in Canada measured our Sierra-1, Doug Schneider had mentioned that the first set of measurements on one of the tests did not look right to the engineer. I don't remember which test it was or why the results looked strange, but sure enough, the follow up tests looked correct to this engineer and the results were then finalized.
Let me ask a simple question, how do you know that what Audyssey measured in your room is correct? You can not answer that without saying that you blindly trust the results. I don't even trust the results of using a $15K measurement rig unless I have become totally familiar with the environment and I can visually examine the actual measurement results... both in the frequency domain and time domain.