Don,
I understand your position. I am saying it is a matter of balance and depends on the pup. I have been struggling with my pup who is now almost 7 months old. He is a very mouthy, bitey pup with good prey drive, but not a super prey happy dog. The trainer at the workshop I attended suggested, based on what he knew about my pup's breeding, that some lines really have what you might call "bite drive" which is not so much a true drive, but more of an oral fixation where they just want to bite you whether you are moving like a prey object or not. This term describes my pup fairly well. He is not a dominant pup, but not at all submissive. If I try to quell the biting too much at an early age, I might loose some of the basic "stuff" the pup brings to the training. On the other hand, I don't want this pup to think he can bite the shit out of me just because he's bored and wants to play. He is not an alpha dog nor a dominant dog. I agree that if I let this pup, he could become unruly, so I put up with some of his shit and correct some of it. It doesn't make sense to squash all of the "inappropriate" biting.
Just to clarify an earlier comment, the trainer at the workshop I attended wasn't saying there aren't a fair amount of workingline dogs with dominance issues, but rather, that the true alpha dog is a rare bird.