I looked through the evo article again tonight. It looks like there may be a bias here, in that Black Falcon is the same team who produced the 'official lap record' for the Zonda F Clubsport earlier this year.
Skip the next part, if you don't want to know the outcome. If you do, this is what they claim the best times for each car were:
1 Maserati MC12 7:24.29
2 Pagani Zonda F Clubsport 7:24.65
3 Ferrari Enzo 7:25.21 (with failing e-dampers)
4 Porsche Carrera GT 7:28.71
5 Koenigsegg CCX (901 hp) 7:33.55
Lastly, here is another brief montage of this event:
http://www.evo.co.uk/videos/planetev...ing_video.html