Truth said:
It was the lumpant and low powered American version, so not 343bhp. If it had been the full fat European version it would of won and dare I say if it had been the coupe instead of the woolly roadster

it would of walked it!
Does your expert opinion come out because you have driven a VIPER? This is so staged it is not even funny. The Z4MC/R is still a reasonably fast car, but a driver who is "on it" in the VIPER in a proper contest is so far ahead, it would not be even funny...
And yes, I do have a reasonable amount of track/wheel time in my brother's Viper, which made a few GT3s weep at various UK tracks...