sounds rather far fetched, but if you can get intake temps below freezing you will drop the thermal transfer for sure.
i wonder how they get the temps so low though, must be one big mother of a heat exchange unit chewing some power.

just think of how much power you lose if an intercooler gets upto 60 degrees, get it dow to 20 and it's far more efficient and you can add more timing. so it does make some sense, i guess it does depend how the engine is used though.