Lol .. cool thread. I do it exactly as Rob described, except i get a tad nervous when im having a traffic light gran prix and my clutch leg gets jittery (like how your leg jiggles when sitting on the loo, come on we've all done it) and lose a bit of clutch control. Problem with the GT is the standard clutch is a bit soft so if you muck up the launch it will stiiiiiiiiiink, however the 6spd is more than up to it. I wouldnt be too worried about breaking stuff, the 6spd gear is very tough. A club member from over at RSLC had a H6 turbo pumping nearly 400kwatw and he tried to be silly with a launch and actually snapped the weakest poing in the tailshaft, gearbox was fine
I scored a line up one night with 2 modified WRX's either side of me revving and wanting a play and nerves aside, by god, i did THE best launch i have ever done between all 3 of my previous Subarus. Those backwards cap wearing punks disappeared very quickly. I had a good laugh, it was very reminiscent of a man in a buisness suit getting the jump on some junkies after his wallet.