In Mcguire they also teach this DD. The reason why the mcguire program doesn't work for many people as they start to hide their stutter. So the goal is to be a so-called "normal speaker" Normal speaker does have repetition and bobulations but as a stuttering person we want completely fluent speech that's bullshit expectation. I agree with Dr. Mort cooper Joseph Sheehan also mentioned this that's why voluntary stuttering terms came into play To stutter with ease then to push blocks