I don't have a dog in this fight and don't make any where near enough power to worry about prep.
Saturday a messed up thing happened though...I was lined up against about a 2011 Cadillac CTS with a tune and street tires running about 11.90's. Just past the 330 where they stopped prep he lost it behind me. Had I not treed him he would have clipped me in the LR. I caught a glimpse of his car in my mirror in my lane sideways about a car length behind me. He didn't hit anything and didn't make any runs after that...maybe he only brought one pair of underwear...

From an outsiders point of view it seems like prep is a crutch...but I'm wrong numerous times daily...