Thanks for all the replies. Very interesting reading. I have a book written by a Scot (my family is Scottish) about it and need to go back and reread it. The little I have seen of herding is fascinating. I can understand why they would not want to do anything to produce good herders if it were done at the risk of dimming down the natural instincts. The comment that we train retrievers to do things they wouldn't naturally (ie take water when land is much quicker, etc.) do versus the herding dogs that are trained to bring out innate traits is an excellent observation. Like Ed said, I would think having them trained for an e-collar when working at great distances would be something the herding owners would think about (and maybe some do behind closed doors!)
I really appreciate all of you answering this in response to the question asked. It is really enjoyable to read/hear about training methods used in various breeds of dogs to bring out the qualities desired in order to fulfill the reason for a breed initially being developed.