Yes, I did/do this. It's really annoying when I count, because my inner voice echoes the last word I said when I'm trying to move on the the next number.
It's worse when I'm anxious or feeling judged. It's a way of getting outside myself and looking at what I do from another point of view so I can improve what others see or understand. Sometimes *I* understand what I just did or said, but clearly my audience is just confused - the narrative voice comes up more then.
I've noticed two things help it disappear: physical activity that requires timely responses that are not repetitive (tennis, but not jumprope), and meditation (sitting in silence and making the thoughts calm down). In one, there is no time for narration; in the other, there's nothing to narrate.
