Very true! Drove 28 miles home from my friends house last night at 10 pm. Was so hot I left the roof down on the Porsche, and I got to my town at 11 pm where it was still 28 degrees celcius. Didn't anticipate how much fun open top motoring can be late at night in the dark.
I think unless I move somewhere with a very different climate I'm sticking with white cars from now on. Between the color and the excellent heat rejection of the 3M tint it's amazing how much less intolerable the temperature is even if the car has been sitting in the sun for a few hours.