No it hasn't. Have you actually read any of the scientific research? They have found correlations, but there is no root cause. Psychosocial and emotional components of stuttering has shown evidence, but at no point is it claimed in her video that it's the ROOT cause of stuttering but rather she attempts to conceptualize a speech block that stutterers deal with on a day to day basis. Her approach is dealing with the NOW of the problem. It's not dealing with understanding the root cause. Please read and watch videos before commenting like this. You're being irresponsible.