Also gotta remember everyone is located in different climates, altitudes, humidity etc etc so some will run faster than others and DA Corrected Times are a generic conversion too give an idea of what you could be running at sea level under the perfect conditions for those who aren't located at sea level.
For instance the track I race at is located at 2210ft above sea level but if you include humidity, temp and pressure on average it's like running a car at 3400-3600ft above sea level. Using the DA Correction from Dragtimes.com assuming I was to race at 0ft above sea level and perfect temps and pressure in theory if I was to duplicate my 12.86 @ 112.07 best time under those conditions I should run a 12.36 @ 116.66
Raced a guy with a 13, base model all stock except for a sw catback. 6mt with 3.31 on the 235 pirelli's. He was running 12.5-12.6. Don't have the exact number but I ran a 12.74 and he was about 2 car lengths in front of me.
Got a new personal best on 10/25/2013 at a private rental hosted at Maryland Int'l Raceway -
In case the Fotki picture disappears, it was a 12.490 @ 113.40mph. The car is a 5.0L/auto 2012 GT/CS, with a stock tune and factory 3.15:1 gears. The only performance mods are GT500 mufflers and 325/45R17 M&H Racemasters on 17x8" Ford Bullitts.