As Coops would say, "What????". No just joking but Coops is very funny. It sounds a bit confusing to me but I am a bit slow. It seems that the official rationale is to assess and initially grade the dogs before they even have a race and if so, no wonder you don't want them to go too fast. Furthermore, I am thinking that the theory is to come up with more competitive lower grade races (similar ability dogs). I expect that if I was there experiencing the system it would make a lot more sense to me. Nevertheless, at face-value, I prefer the basis of our system: win a maiden and then work your way through the grades, the same applying to all dogs.