Test is a joke. You know I know the lap times at several common tracks for the cars. If the ZL1 was running away like this guy claims, it's because they simply aren't man enough to handle the GT500.
Ford GT National Rally I, II, III, IV, V, VI, VII
Indy 07, St. Pete 08, LE MANS 2010(!)
Texas Mile 200 mph Club
First it's pretty tires. Next it's pretty guns. Then the next thing you know, you're shaving your beard and wearing capri pants.
What the Ford gains in perception, it loses in drivability thanks to a tall 3.31 rear-end gear that allows it to reach 60 mph in 1st gear and claim a top speed over 200 mph. This gearing is purely a marketing tool designed to achieve stunning 0-60 numbers and a headline-worthy top speed. The trade-off is overcoming that tall ratio every time you pull away from a stop in the Shelby. Ample torque makes this manageable, but it still requires considerable attention to an area where the ZL1 is utterly seamless in comparison.
I find this to be true for the FGT as well. I like how the car drives with the Stillen's 3.90 gears not only for the track but for everyday driving.