Im not so sure it would be cold? It is after the turbo (very hot on some setups), cooled by an intercooler (not always such a good one in most setups) and then 1 ft of pipe later it is in that throttle body, so the output of the intercooler is the temp the throttle body will see. Under load that will be hotter than "bloody cold".

If that small a surface area at a reasonably close to ambient temperature could really cool air in that short a period of time, we wouldn't need intercoolers.

I can't see why anti lag would want to see the temperature 1 nano second before it normally would, with the air temp in the plenum. Maybe the plenum is cast differently and they don't want to drill it? Even then that is a very random guess, as I don't know either, without seeing so much more of the engine and setup.

RW