I hit 14.8 and im not bullshitting. I have a 2004 4.4 with dinan exhaust.
The way i launched it was. I drove through the wet box to get my tires wet. then i shut my DSC off. I know only drag racers that are trying to heat up there tires with a smoke show go through the wet box. But i went through it so that with my tires wet i can get some wheel spin for a better launch and it worked. I didnt smokem but i defintely chirped them pretty hard for about 10 feet. And it launched hard.

I tried it with dry tires the first run and did a 15.0s flat. The wheel spin with all wheel drive defintely helps for a good launch. You should try it. get your tires wet first. But my goal is to get a 14.0 flat. I am just waiting for dinan to come out with some more mods so i can get there.