Yes I know the reasons they stated. I talked with mike about this but I'm not convinced. I base my assumptions on how a mass air system works. Your mas reads a certain air count and the ecu spits out a corresponding fuel trim. I don't see how flowing more air (that the mas actually sees) will make such a drastic change that your can will go from the overly rich factory condition to borderline lean/detonatoin.
I think it has a little to do with the car being new and everyone's scared to test the boundaries of what's safe and what's not so they just listen to a few tuning companies who want people to buy products from them.
I tested my theory on Futureprospect's WRX which runs a CAI, full exhaust, and some other crap, but no ecu modification. I logged his car, he is running quite rich and timing progresses steadily (i.e. no knock).

All that aside, I'm not trying to start an argument. I'm not trying to say that turboxs or vishnu or whoever is wrong. I'm not that arrogant. I'm not trying to tell anyone to listen to me over them. I'm not trying to say that people shouldn't listen to the popular wrx tuning companies. I hope that's enough of a disclaimer.

I just like to gather information for myself and use my own knowledge.