Maybe when you start to feel a stutter, you speed up to get out as much as you can on this go. I personally speak fast by nature, but the faster I speak, the less time my muscles have to coordinate with each other and thus the more I stutter. Speaking slower, when i actually want to, also helps keep the tension and the nerves lower so it's easier to speak as well. btw, was there anything in particular you did or learned with your therapist which helped you so much?