Its a US survey, 350Z drivers in the US have a really bad rep. The Us reports show the 350z has an especially high instance of single vehicle crashes (normally the result of reckless driving)
I reckon the UK won't be far behind. Just look at a the age of most of the new members on here. Its what comes whan a performance car drops in price and the car has an easy access modding scene.
I could be an idiot (at times) when I was young but I was behind the wheel of mini metro or a citron AX!
Not saying all our youngsters are irresponsible, but maturity does come with age.