I've done it in a mk5 GTi (my mate took some footage on my camera phone
http://www.youtube.com/watch?v=9hN5VAha8RU )and saw a couple of superbugs in the car park too. I didn't get a chance to talk to the bug owners, so no idea on lap times.
I will be going back there sometime next year (am thinking april or may at this stage) but if a group of you guys are going to be there I will definitely work my trip around it