I haven't come across a single NH trainer who *doesn't* talk about leadership, or moving the horse's feet and releasing pressure as abolutely key elements of training. All these guys, if they are any good, are more or less on the same page, at least in terms of the paradigm they have of horse psychology and communication. It's more about training the person to communicate with the horse; practices vary with how to do that.
Maybe in the end it comes down to what works better for the trainer rather than the horse; after all, human beings have their own predilictions.
Well said and the thing is that none of these qualities are confined to just Natural Horsemanship but to ANY trainer that attempts to teach the horse with understanding.