If you had not said it I would of. These creatures are amazing. They quickly learn what is expected of them and where as long the trainer/handler is consistent too.
As for the moving reward it is correct application and done that way on purpose. That is why there is a "good" marker and a "yes" marker. The "yes" marker releases the dog from a stationary position and the reward is delivered in motion to increase it's effectiveness. Chasing the reward is a self fulfilling activity, meaning the chase itself is a reward ON TOP of the food. Delivering rewards in motion increases motivation and builds drive in the dog. That's in the video on delivering rewards properly or the training dogs with food video, I forget which one. It's also very useful later because it's very easy to chain the dog's name or "back" over top of the release marker in field work.
I can only tell you from the one dog I have applied this to long term. It is an absolutely dynamic basis for Carr based retriever training. Once the communication system is in place it is very easy to work through the collar conditioning, force fetch and other elements of the program. The dog is not only engaged and paying attention, but they really understand what "good" and "yes" or "ok" mean, making life really easy. I'm in T work now and pup will look at the side piles once in a while but when she looks down the middle and I say "good" she locks on, ears up and gets ready to launch. That communication would still be in it's infancy had I not done my obedience using these markersand some other stuff I picked out of the Hillman videos.
I have used this system now on several pet dogs and find it extremely effective. I also teach a simplified version to clients and it works for them.
Just had my 6 mo YLF in to the vet. She is seeing ACL problems with the Brit dogs as the lines in the hind quarters are to straight.
I have 6 of Micheal Ellis Dvd's. He is very good at explaining the methodology of training with markers both + and -. His DVD on finishing work is one of the best out there. His "Engagement training" is the base of my puppy training.
The British field Labs I've seen tend to have much better rear angulation than do most AKC field Labs. Could be a particular strain of British Lab in your area that your Vet is seeing that lack rear angulation, however that is not my experience.
UK labradors would not win in US field trials?
US labradors would not win in UK field trial?
How many generations does it take to breed for type/a breed? Six generations, is that right, before they can apply to the Kennel Club?
So UK and US labradors could/would/should be different. Simple really.