Is that a good idea? I always thought it's best to start the car and drive it as soon as possible after - at least that's what used to be recommended, maybe it's no longer necessary...
Intresting thought. I found this one online:
http://www.jsonline.com/weather/headlines/79023122.html
However, it does not conclude anything, I believe. I suppose the car should be warmed up at least a bit (like 2-3 minutes) in extreme cold conditions before take off. Just enought to remove snow and frost off the car ;)
It takes longer than 2-3min