30 secs sounds pretty minimal...most people probably take that long straping o the seat belt and turning on the radio or what ever...I guess the goal is to make sure oil is circulating through the turbo. I don't know about most peeps, but it takes a bit for me to manuver out of my parking structure, so there's no boost until the opne road anyways.
INstead of counting in your head...how about an oil pressure/temp gauges? That's probably the best indicator when your car is warmed up proper.
I agree that TT's are not required for stock turbo as long as common sense prevails...i.e. don;t shut her off right after hitting full full boost and redline driving...
Another trick I got from the boards to start the car is to turn the key all the way...wait a couple of seconds (you can hear the pumps going) and then step on the clutch to start the engine. Thru this method I get almost immediate engine start w/o any hesitation...even in below zero temps.