LOL, I'll have to give you that up to a point Woody. Terriers tend to be "very" independent compared to many breeds. In the yard here, I have so so influence when I tell them to do something. The difference is astounding when I load the up to go hunting. They live to hunt and when I tell them to load up, it is a done deal. Their hearing improves dramatically.
Remember, there are 20 to 25 dogs here in the yards, always interacting.
It seems to me that if they loved to do sport work, the reaction would be much the same. Now, I was wrong once or twice, years ago but, if a dog is meant for what you are doing, it turns him on. He is a "natural" is the term most commonly used in hunting. Many trainers use deprivation techniques to turn a dog on. If the dog isn't interested in the work, they crate him so that they can see the others out doing what he should have done. Eventually, he wants to do it in limited fashion. I think they call it drive building. If the dog needs drive building, the way I see it, you got the wrong dog.
Woody, I may be to cut and dried for much of the modern way of thinking and, being a breeder, I am not willing to go with dogs that don't have the desire naturally. Breeding and trainers have very different outlooks on much of this. I will not breed dogs that have to be coaxed into things. They are no more than pets. Trainers will take those same dogs that need coaxing....and coax them into something. From my view point all the coaxing in the world will still not make them the right dog. Granted, there are varying degrees. Some or not far off and are workable, many are not worth the time. You also may have a dog that can cut the mustard and this may not be relative to you personally.
I did find the article to be on the money from what I have seen of competative methods of training. That does not mean that they all use the same methods.