Just to reiterate, I'm talking about street driving, not track and heating tires. The trans is a built 727 with a MVB.
Its been my IMPRESSION this is more of a problem with slicks since it is the shock of the slicks suddenly stopping the drivetrain motion that damages the sprag assembly.
It could be a problem on the street with sticky drag radials. Average street tires are too slippery for the drivetrain shocking.
That being said; I still make sure I'm not in first when letting off the loud pedal on the street out of habit.