The Boss is... Boss

Motortend just ran a Ford Mustang Boss 302 on the Laguna Seca track.  Best lap time was 1:40.21... which beat Nissan GT-R, Audi R8 4.2, BMW M3, Cadillac CTS-V, and Ford's own Shelby GT500.  

From www.fastlaps.com:

10. Ford Mustang Boss 302 1:40.21 129 '12 446 / 1659 Motor Trend
11. Nissan GT-R 1:40.45 129'08 479 / 1740Motor Trend
12.Mercedes SLS AMG 1:40.74 129 '10571 / 1620 Bern Schneider
13. Audi R8 4.2 FSI quattro 1:40.75 129'06 420 / 1560Motor Trend
14.Chevrolet Corvette Z06 1:40.90 129 '05513 / 1437 Motor Trend
15. BMW M3 (E92) 1:42.96 126'07 420 / 1619Motor Trend
16.Porsche Cayman S(facelift) PDK 1:43.00 126 '08320 / 1375 Motor Trend
17. Porsche Cayman S 1:43.00 126'05 295 / 1406Randy Pobst
18.Aston Martin V12 Vantage 1:43.04 126 '09517 / 1680 road&track
19. Cadillac CTS-V 1:43.90 125'09 564 / 1955Motortrend
20.Shelby GT500 1:44.30 124 '10547 / 1767 Motortrend
21. Shelby GT500 1:44.72 124'06 507 / 1807Motor Trend
22.Shelby Mustang Cobra GT500KR 1:44.72 124 '08540 / 1773 Motortrend
23. Porsche 997 Carrera (2008 facelift) 1:45.00 123'08 345 / 1415Car and Driver
24. Jaguar XFR 1:45.37 123'09 510 / 1960Motortrend
25.Chevrolet Camaro SS 2010 1:45.70 123 '10432 / 1750 Motor Trend


Neat video here.