A 12.4 out of the 15 is easily believable for me. My brothers 100% bumper to bumper stock 11 6a car went 12.48 at 112 in very cold weather with track prep.
[video=youtube;y1mWSVVj2HI]http://www.youtube.com/watch?v=y1mWSVVj2HI[/video]
Car and driver 2007 GT500 12.9 @ 112. My 09 stock went 12.16 @ 113
Car and driver 2011 GT500 12.4 @ 117. My 12 stock went 12.06 @ 117
Of course I was lying when I stated stock, just had to embellish to make myself feel better.
THIS! Not too mention that C&D said the '11 Mustang GT ran a 13.20 at 109mph.
Have much experience at the track? Bad DA? Poor track prep? Several other things come into play.
Magazines actually almost always correct/norm the data. It's pretty well known.
Not picking a fight, just informing you politely.