From the Sea level ET and Trap Speed calculator that I used, your conditions couldn't have been more perfect. Cold enough to get all that power and humid enough to get traction. Here is the results based on a run around 1pm. The track conditions was even better around 10:30 am that morning.
Based on:
Temp: 51°
Humidity: 43%
Track Altitude: 80 feet
Pressure: 30.32 in.
Density Altitude = -818 feet ET MPH
Uncorrected 12.79 @ 109.72
Corrected 12.89 @ 108.87
For the calculators do a search on the forum for track calculator. ChiTown also set his times on one of the best days possible. Weather sure plays a big part, it's why John Force Racing has a full weather station in one of the diesels at every stop on the circuit. Great time and skill, we all know it takes a certain amount of finesse to harness that power to the track.

Cruzinquick