I have another question for you who have a E9X M3.
Have you ever tested to give gas and push brake at the same time while moving?
Some newer cars shut down the trottle while doing this.
I saw a video clip of a E90 M3 doing a standstill burnout so that seems to work but i wonder whats happening while you are moving?
Some racecars drivers push the brake a little while going full thottle before a turn to preload the brakes.
And some people use it in turbocharged cars to spool up the turbo while racing on the move and also in trackracing to get boost out of a turn in cars with turbolag.
And can also be used to load transfer the car and also get the backend out on fwd cars.
There are other benefits with this technique too.