Drag racing IMHO is only a small fraction of what makes a car great... how it handles on real roads is the true test and Ford does not put out well in that department.
Please do not tell the Cobra folks I hang with that. I watch those $40K Cobras eat Z06's all day long, on a road course (most have Mustang suspensions, some have Jag, some have custom).
At the end of the day, it is the driver and the car. If the driver sucks, so will the car. If the car sucks, it cans till win, but only against a poor driver.
I know some damn good Cobra drivers, and I know some damn bad ones too.
For me, if I put as much into my car as it costs to purchase a Z06, I would have a Z06 eater as well. I am not sure why it is important where the car was built. Anyone can buy a Cobra, so it should count as well.
As far as the new Boss302 goes, it probably would not beat a Z06 on a track with a lot of long straights, but the Boss suspension is more than competent enough to give a Z06 a good run for the money, for a lot less than the cost of a Z06. A Boss will eat a BMW M3, on a road course. Thats good company.