I failed two tests. The first time I just screwed up, the second time the examiner was a moron, third time got the same examiner I had for my first test and passed.
The guy I had for my second test, my instructor had a student take three tests with the guy, first time he failed for a RRC, second time for pulling out in front of a car, third time he stopped for a parked car, the oncoming vehicle stopped and flashed him so he went.
The fourth test the same guy got a different examiner and passed with 2 minors. Bearing in mind he had no lessons between tests 2 - 4, I think it's ripping the piss.
The moral of the story, it doesn't mean a damn thing passing or failing, if you fail it's extremely annoying, but you'll pass one eventually so keep your chin up.