A buddy at the track with his Shelby runs 11.6 on street tires (pulley, CAI), assuming he gets a good launch with his M6. I'm a half-second (12.1) behind with my bolt-on automatic SS.
When we're at the track, he spends a half-hour with an ice bag on the blower, hoping heatsoak won't kill his next run. During that half-hour, I get 3-4 back-to-back runs, all within a quarter-tenth and quarter-mph of each other.
When I cam mine, I'll be consistently quicker than him.
To each his own.
Padre