You need a high quality slo-mo vid to see one full rotation. If you see it with the naked eye live, it's more than one rotation, or it will turn in to far more pretty quick!
It is hard to stop a radial from spinning once it starts - esp with a turbo or S/C. I always have to backpedal.
You are correct sir, a high quality vid camera is a must to see it. But in the car you can feel it. If your having to backpedal to stop the spin, you left the line with too high of an RPM. Back it down a hair. I launch the car with a 175 shot of nitrous. If I back pedal then the nitrous turns off then when I get back into it then it comes back on. Not very good for traction. Control at the start of the run is key.
Below has nothing to do with my response to T6Rocket, just general info and pics to try to help anyone reading this.
Here is a pic of me launching on 17" nitto 555Rs If you blow the pick up you will see I am hooked and if you look just behind the tires, I had a little spin and the front is still rising. The anti roll bar is not hooked up in this pic.
Here I am on slicks with my heavy front wheels still on the car with a 5 grand clutch dump. Look how out of shape the car is. The anti roll bar is not hooked up in this pic.
Here is a pic on slicks again with the anti roll bar hooked up. Notice the marks behind the tires where I just barely had a little spin just like I wanted and how more in control the car looks in this pic.
The anti roll bar is the difference between the 2 pics with the car on slicks, but it is also not hooked up for the drag radials. Clutch control and tire pressures aided in a slight spin with the radials then them hooking. Unfortunately my camera man did not get a pic of me hanging the heavy 17x9 front wheels while on the 17" nittos. On the nittos I was leaving at 2,800 with no 2 step. With the slicks i was leaving at 5 grand off the 2 step and on the nitrous.
On the radials I I hold the gas pedal at 2,800 RPMs, then start releasing the clutch and as the tires hook I roll into the throttle, not mash it down.