^ ^ Exactly.
On page 47 in the A2010's manual (and on page 6 in its Easy Setup Guide), it states:
"YPAO measurement is not performed correctly when any obstacles are in the room."
"During the measuring process (about three minutes), keep stuff in the corners or remove it from the room."
I think it's fairly obvious that by "obstacles" and "stuff", Yamaha is referring to objects in the room (lamps, art objects sitting on tables/stands...) that -- because of their size and position -- could possibly obstruct the soundpath between the speakers and the YPAO microphone. Regarding removing furniture
... even if I were willing to do so, it seems fairly counter-intuitive to me to suppose that measurements made in an empty room would still apply, once the room's furnishings were replaced.
I appreciate your response, though. Perhaps, in cases where the room is a completely dedicated theater-room, and the room's only furniture is its theater-seating, it does work out to be better. The vast majority of us, however, whose home "theaters" are also our fully-furnished living rooms, do not enjoy such luxury.
The other thing that i found odd was that it stated to set volume on woofer at 1/2 but also said to set crossover to max. Just thought you would set it somewhat close to desired listening as a starting point.
Not odd at all. Setting the crossover to max on the subwoofer allows you to set it in your AVR to whatever value works for your setup... the point being that your AVR should be the only instrument which controls any of your speakers' crossover settings.