not always true,
I've had my r34 for more than 2 years and only just got off my P's a week ago.
In that time only pulled over 3 times, 2 RBT's 1 I powerslided a corner and an undercover copper saw me (stupid I know, bad day, brain explosion, my bad)
undercover cop asked me why I did what I did, I was very apologetic and admitted I was in the wrong, let off with a warning.
1 RBT was breath tested then let go, the other one they made me pop the bonnet, but was let off with a warning about the exposed pod to get fixed.
I say it's more your attitude and driving than anything else