So where is the OP ?
I am still wondering how old is the dog and what exactly is the problem?
First, having never trained a retriever or even picked out a puppy, the new trainer is worried about one thing - is my dog birdy enough to retrieve? When you find out he is, and maybe even that he really likes it, it is such a relief that you just let some things go that you shouldn't. This is the new trainer's only dog, so even if the trainer takes advice and doesn't throw very many marks, I doubt they have the foresight not to let the pup pick up all the marks. I didn't.
On the flip side, once you discover your dog is birdy enough (and then some), you probably begin to hear/learn that it is possible to make mistakes with some dogs (whether with the collar or physical corrections) that alter them forever. The old (and mostly true) "I can take it out but I can't put it (back) in." Now the new trainer is on notice that you can "ruin your dog" but has no idea really how to read a dog to decide that it has a lot of drive and a lot of bottom such that short of repeated random beatings with a 1 inch dowel you are not going to ruin the dog. And hopefully nobody is going to be doing that anyway.
So, what you end up with, at least in my case, is a fairly talented dog with GREAT momentum, but one that I have allowed to think that all birds are his. This is manageable at the line, probably because he has figured out that if he keeps it together there he will get the birds, but it all blows up in the honor situation.
Luckily I have some good training partners, most notably fishduck, who can read dogs and who figured out the problem was about 1% the dog and about 99% me. He put us on a training regimen to start to change the mindset by using the dog's birdiness against him. If he wants the bird we have to be steady for extended periods, and sometimes we don't get the bird even if we are steady. We are consistently using a mat to define steady. Any movement from flinching on up is cause for an immediate correction and the denial of the retrieve.
After a solid week, we had a training day today, and he was much, much better on both marks and honors. We are still in the early stages of this reprogramming, and I was using the collar and a visible heeling stick today, but for the first time IN HIS ENTIRE LIFE he was completely still as two marks went down. We are still creating a habit, and we have a long way to go, but I can see progress being made. We will eventually remove the collar, and the heeling stick, and we will add ducks, duck calls, shots, and other distractions and eventually have a nice dog to hunt with and play the dog games with.
I wish I would have done this much earlier, but at least I finally got the advice I needed. I guess it is true that when the student is ready (and has lost the entry fee for two tests because the dog breaks on honor) the teacher will appear. Thanks fishduck!!!
To me, "Too much drive" generally translates to "Not enough human to handle it".
And what Pete said.