Yeah, to be fair the tests need to be indoors in a controled climate, adding airconditioning use makes indoor tests all the more important. Outside you have temp, and wind and traffic which change from day to day. What they need to do is increase the speed of the highway test to reflect current speed limits. They also need find a way to make sure hybrid batts are not used to cheat buy running the car in pure EV mode. This would be quite a trick as I'm not sure how you could ensure a batt pack has the same charge at the end of testing as it did in the beginning.