An interesting discussion, OP, and I've had a day which has illustrated different ends of it. I went with a friend tonight to see Mary Ray - she was demonstrating how she trains her dogs. Mary has several collies, a lurcher, a Chi and a Sheltie. She has won numerous awards/competitions for obedience, agility and pioneered HTM (she regularly appears at Crufts). Mary is interesting because she has been in dog training for over 35 years and by her own admission is a "crossover". She started out doing what you might call traditional obedience training, but then about 12 years ago discovered clicker and like many of us went WOW! Now she trains her dogs to the most amazing levels using clicker and positive methods. While certain posters here are famous for their ability to control their dog using their raised eyebrow, Mary is a terrific example of the fun and positive way dogs learn and can put together really sophisticated routines/behaviour. For me the proof really is in the pudding - clicker is quicker. On a personal note, I took one of our greyhounds to KC Gold CGC Award the year before last - a positive trainer but not clicker - I enjoyed it but it was hard work at times. Now I'm doing clicker with one of our foster bitches - we are flying at class - she loves it and it's just so much easier.
This morning, I was in a meeting with other rescue people with the Welsh Government to discuss proposed changes to legislation around Dog Control. One of the most eloquent speakers in the room was from a local rescue who described that many of the dogs who are relinquished are ones where their owners have tried dominance based theories to manage unwanted behaviours, and not surprisingly have found the problems have not improved or sadly have even worsened. Wales is looking to make some very interesting changes with regard to dogs but around that table today everyone (including vets, civil servants etc) were strongly in favour of promoting positive methods of training. OP, as a vet, I can only imagine some of what you see and how frustrating it must be.