Curious roughly how many non wing sprints run right rear brakes?

Very few

Unless things have changed>>>with a locked rear end one brake usually mounted to the center section of the axle takes care of both sides>>>>

More common on wing cars.

Use only if you need a yellow!

Thanks for the responses. Asking for hooking up coming out of a dry slick corner for forward bite, not for stopping the car.

Most of the better drivers use an accelerator modulator device to hook up on dry slick tracks.

True!!!