its funny that you mentioned apdt they are crowd that actually put me off recommending dog classes to anyone, so far up their own arse's, with no real understanding of the canine mind and no reference to drive what so ever, every recall was based on providing treats, perfect for a Yorkshire terrier but useless for anything with any sort of drive,
i would think most decent owners of driven dogs have a better understanding of how it effects their mutt than most of those snake-oil salesmen,
Fair one matey, I would think a decent amount of animal sense is the best qualification