Look at it this way, if the tuner did some work on ur car and wanted to show you how much power you have gained from his work, when i reality he didnt do didly squat, he can place the temp probe for the IT on the exhaust manifold and do the dyno run. So the actual intake air going into the engine could be 30 degrees but since the IT probe is reading 150 degrees the computer will give you a higher reading to compensate for the apparent higher intake temp it thinks there is.
Shootout is meant to used so that you can compare the power a car makes in the desert to another car in antartica, but its very easy to bs results 2.