Well, he hasen't started anything really. Just giving his opinion, based, I would imagine, from his experiences.
But the fact still remains, lurchers were originally bred to provide their owners with edible quarry, ie, rabbits, the odd hare and the odd gamebird, NOT to be tested on how many foxes they could kill in a certain amount of time. That's just the modern thing that people do to try to get 'one up' on other people. 'This dog has been properly tested' blah blah blah