The drive by wire throttle delay on the late models definitely make consistent launches difficult to say the least.

I raced my brothers completely stock 2010 Challenger R/T (Hemi, auto) in the Street class at Monster Mopar Indy last fall the best run it did was a 13.62 at 102 mph.
I made it to the Qtr finals before getting eliminated.
The car ran about a half second off the dial in on the last run.
I'm not sure why (wheel spin or what) but it the car ran about a half second off the dial in on the last run (But the mph was still 101).
Ahh well, I thought I did pretty well for a car I hadn't driven before driving it up to Indy.

I drove it there, raced and then dove it home which was fun and simple.

A pic of my brother and his Challenger.