I can all but guaranty that pro level racers are over the limits of traction into and out of every corner, chopping the throttle to slide the front into the corner and lighting up the rear to a degree on the exit of every corner.
By pro level, I mean riders that get paid to race. Not club racers at the local track. Though, plenty of them are very fast and slide both ends consistently.
Any one here ever purposely close the throttle to induce a front end slide to scrub off speed?