No it hasn't. Lowering the rev limiter will just cause it to bog down for a second. The trans shifting is controlled by a set RPM in the TCU, so until someone cracks the TCU code, you're stuck with the factory set shift RPM. I have to ask, why would you keep the pedal way down when you're smoking the rear tire? With the power you have now, you'll have to roll into the pedal for a second before pushing it all the way down. That will give you a good controlled launch with minimal tire spin in most cases.