I went along to the Brands Hatch Full circuit track day as a passenger and blagged a few rides :

Coyotes beast which was extremely uncomfortable but very very quick (good fun sitting on the tail of a Radical for 8 laps) (thanks Andrew - glad we got you going eventually and that the "outlaw" driver didn't bend it)

340R which felt luxurious by comparison but was still quick (good to see lots of sevens overtaking us though)

One of the 6 or 7 GT3RS porsches which were awesomely quick, but were still having to give way to Radicals and the sevens,

and a ride in a Lambo Diablo which was being driven very gingerly but quickly (owners first track day) which felt like I was sitting in a gentlemens club with all that leather and plush seats. Lots of grunt though and a nice engine noise behind your head. The owner kept it in third most of the way round the track as that was all he really needed - could have been an auto and not made much difference. Beautiful car.

Verdict for the day - sevens are still one of the most raw, fastest and most fun cars out there. All the others were beasts but way too cushy. Will put some pics up soon. Great fun for £10.