Can you give success rates of using an SLP? If not no worries, there is no cure for stuttering afterall and so the success rate in technical terms would be low. Many people find it doesn't work and find the methods exhausting and hard to implement, not to mention the price... I tried SLPs twice with extreme frustration with their methods and had to go to an external source to find some relief in my speech. But if you have data on success rates for SLPs I would be happy to hear since you are in favour of them.