I don't believe there can ever be a system that can tell you how well a dog produced most in part to what jack said and additionally there is no way for you to account for the dogmen who had the offspring. You can only track a dogs achievements in these systems and it only tells part of the story as i'm probably willing to bet that most of the truly baddest dogs to set foot on soil probably didn't achieve anything in life and never left their yard.

I do think all these dogs on the rom list deserve to be there though. I agree that it cannot tell you who the best producer is based on numbers.... but lets not forget the fact that there is dogs out there who produced a hundred litters and they were all shit eaters. So the list may not be compiled of the greatest producers number wise but they still produced and that's all I see those systems/lists as. Dogs that did infact produce dogs with achievements.