Good to know! That confirms my suspicion that cold air intakes don't make any difference in the air temperature the engine sees at highway speeds. So the only performance increase is due to the placement of the air inlet (I assume the air pressure in the engine compartment is lower due to air moving around compared to high pressure areas such as the front of the vehicle or the base of the windshield).

When idling the intake air temperature might be much higher but that's when I could care less about ultimate performance