RC:

10 laps is a bit extreme for amateur fun driving, don't you think ? 

 I don't think so. It's the standard session duration for a sportscar on a trackday I would say.

One lap to warm up the tyres, a good 8 laps of fun and one lap to cool the brakes.

On a F1 track like Monza, that's about 20 minutes.

I remember my first trackdays with my 2003 Boxster S, I would drive for 20 to 30 minutes.

That's why those laptimes have to be taken with a pinch of salt from the media, yes it's really cool that a Panamera Turbo S can lap quicker than a GT3, but for those who enjoy trackdays, the fun is in driving several laps.

A good trackday with a GT3 would be 4 sessions of 20 to 30 mins I'd say.