It was pretty interesting being in the same novice-intermediate group with that 2011 911 GT3 RS-- just point him by when we saw him.
As it was a BMW event, those were in the majority. However, there were also Porsches, Subarus, Corvettes, Audis (the RS4 sounded just awesome), a couple of Exiges (they got lot's of practice doing point-bys on the straights), a Mustang, a Pontiac G8 (Vauxhall/Holden Monaro?) and even a 1971 Datsum 510.
Everybody had fun, though there was a 944 that tried to climb a tire wall.
The track had some elevation changes that resulted in some blind corners with views of nothing but sky as until you crested-- required a certain amount of braveness as you learned the track.