I've found just a little wheel spin works best for me. The trick is to control it, and it's a fine line between a 'little' and 'going up in smoke'. I launch around 2500 rpm or so, but it really depends on your gears and tires what works best for you.
Surprisingly I worry more about the 2nd gear shift, THATS when I'm more likely to get serious wheel spin, at times accompanied by a serious 'pucker factor' as the car starts to dance around!
