i also let mine idle for about 5-10 minutes. I hammer my car hard, so i don't move till the car is at ideal operating temp. (my car will see over 5k rpm most trips)
turbo'd cars better let their car get to temp!!
terminator v8 in an SVT focus (soon to be boosted @ 20 PSI with a 2.9 L Kenne Belle on Corn!!!
(750 rwp and low 10 second focus, here I come!)