It just ocurred to me that that actually isn't true. 10 is the best but 1 is the worst. So in actual fact, the Dutch system is more accurate than the UK system. Because the average of 1 and 10 is 5.5 and not 5. In Holland anything below 5.5 is a fail. But a 6 is still considered average. In the UK you can simply get away with less... things that are in fact technically below average.