[LS1Mike]

Here is something to ponder
These times are all from Motor Trend.

03 Cobra 13.5
98 Camaro SS 13.7
00 WS6 13.6
04 CTS-V 13.6
01 Z06 13.0
These are all 6 speed cars.
My 00 WS6 ran 13.17 bone stock in 90 degree weather, poor DA, 2.1 60 foot on Eagle F1s.

We know these cars are all faster with just a normal driver. My Guess is you are going to see this thing hit Low 13's high 12 after some folks get some seat time.
One test of 13.70 does not a bad car make.