Interesting: so, in theory, this would seem to indicate that the measurement methodologies give different numbers, or simply that that 400 mW of power was enough to make it legal one place rather than the other. Again, though, I don't understand why ad-hoc mode vs infrastructure would make enough difference with SAR since it should be the same transmitter running the same 802.11x protocol (signalling/Layer-1/2 wise) . This is just so weird, and googling comes up empty for specific numbers or explanations.

P.S. I don't buy into the whole SAR business, anyway, but I readily admit I'm biased.