Regardless of aac the engine will always respond to throttle the same, not sure what you are on about here. No way will you notice a difference.
I said when you touch the throttle you are onto the main timing map, doesn't matter if the air is all coming throigh the butterflies or some sneaking in via aac, the air is going into the engine and the spark is determined by main timing map...
Idling at 12 is fine, so long as timing gun shows what ecu thinks all is good and nothing needs changing. No one gives a shit about rbb26 idle fuel economy.