I used to use mine all the time on the track. As I've gotten out of my street habits, I don't even touch it except waiting at pit out.
BTW the spot on the RA track I mention, the superbikes aren't just power wheelieing, the black patch across the track is like a jump and initiates a wheelie. The Speed cameras would cut away just as the bikes would get to that point on the track. Yes, the AMA Superbikes are powerful enough to power wheelie as evidenced by doing so elsewhere, but in that spot you'll see much less powerful machines with the front wheel in the air too. My '99 R1 doesn't normally wheelie in 5th gear. Also, in the Superbike race which I recall happened on June 8th, when Yates had the tank slapper on the front straight. If you watch closely the rear tire was spinning and that is what initiated what looks like a tank slapper. My guess is the rear tire left the ground, spun up and when it landed again, instead of gaining traction and pushing the motorcycle forward, kept on spinning. Like I mention, if you watch the video closely you can see the front wheel is planted and the back end of the motorcycle is moving left and right. Nothing against Freddie Spencer's commentary per the Yates incident, but if he rode the track recently he likely would have said the same thing I'm saying. When I didn't use the rear brake as mentioned, I would be tossed off the seat and when the bike landed I would be slammed against the seat rest, even if I had already pushed back against it. A couple times when the bike would wheelie the air passing over the bike would cause it to weave left and right a little until the front tire came back down.
Yes, in HEAVY braking zones, especially at the end of long straights. I found I used it three times per lap at CMP. T8, T11, and T14 I am pretty used to having the rear move around though, and it is just how I do it. But always let off of it before turn in