Nick I see a couple of issues ...

- myself and others who ride outside the 1000 and 600 classes typically run with smaller grids and therefore do not reach the 10 rider threshold
- as riders get older they go slower (well most do) eg I will never be as fast as I was 20 years ago and realistically my level is at the bottom of the non novice (and heaps of those were in front of me over this weekend)