Was the R8 ever really a fast car?
Yeah, actually, it was very quick on the track. Straightline, no, but on the track, it does amazingly well.
Bedford West Circuit Lap Times
1. Porsche Carrera GT 1.19.7
2. McLaren F1 1:21.2
3. Ferrari Enzo 1.21.3
4. Nissan GT-R 1:21.7
5. Lamborghini Gallardo Superleggera 1:21.8
6. Audi R8 1:22.1
7. Koenigsegg CCX 1:22.3
8. Lotus Exige-S 1:22.4
9. Porsche 997 GT3 1:22.6
10. Ferrari 599 GTB 1:23.1
11. Porsche 997 Turbo 1:23.6
12. Porsche 996 GT3 RS 1:24.2
13. Ferrari F430 1:24.2
14. Corvette ZO6 1:24.5
15. BMW E92 M3 1:26.6
And from the article mentioned in the youtube video from the OP:
Motor Trend - Laguna Lap - The Fastest Production Car Lap Times at Mazda Raceway Laguna Seca
No caveats here. The lap times are supported by hard data and represent showroom stock cars -- no cheater tires or modifications allowed. Cars with adjustable suspension can be set-up for track conditions, as a customer would.
Lap Times:
1st: 2010 Dodge Viper ACR - 1:33.92
2008 Dodge Viper ACR - 1:35.12
2009 Chevrolet Corvette ZR1 - 1:35.83
2007 Porsche 911 GT3 - 1:39.57
2009 Nissan GT-R - 1:40.45
2011 Mercedes-Benz SLS AMG - 1:40.74
2009 Audi R8 - 1:40.75
2006 Chevrolet Corvette Z06 - 1:40.92
2009 Audi R8 R Tronic - 1:40.92
2008 Porsche 911 Turbo - 1:42.51
2009 Porsche Cayman S PDK - 1:42.95
2008 BMW M3 - 1:42.96
2009 Cadillac CTS-V - 1:43.85
2010 Ford Shelby GT500 - 1:44.32
2008 Shelby GT500KR - 1:44.72
2009 Jaguar XFR - 1:45.37
2010 Chevrolet Camaro SS - 1:45.72
2007 Lotus Exige S - 1:45.82
2009 BMW 135i - 1:46.01
2010 Nissan NISMO 370Z - 1:46.53
2006 Porsche Cayman S - 1:47.58