Last time I attended a private track rental at Atco Racewy in NJ, there was a stock Viper that ran very low 12's all day. I remember this because my car was running low 12's all day and finally hit an 11.97 on the last run.
My observation on the viper, it does a great job on the 1/4, but was crossing the finish line with more gears to go. In other words, once you get past the 1/4, the viper would spank a GN.
Obviously the viper handles a lot better when you get north of 120mph also.
I was counting his shifts and I think it was crossing the finish line at 120mph, but it was still in fourth gear....These cars have a lot more 'upstairs' than our cars.
PS - A guy I work with has a Viper . He recently put on the Nitrous and went straight into the 10's and was thrown off the track for no roll cage. Now that is street lethal.