The pedal dance is for the ISF as well. I've done it. What the pedal dance does is it comepletely turns off all aiding electronics that help with traction control. Including the electronic limited slip that acts as a form of traction control. Even with the traction control off and vsc off the car will still apply breaking unless you disable the ELSD. Doing the pedal dance turns the car into a one wheel wonder though. There is a thread on clublexus explaining it in full length.