[rdtsc]

> When I'm alone, I don't stutter at all if

From a sample of N=2, I can say that's pretty typical ;-)

But to be serious, I don't think that's uncommon.

> I didn't stutter when I was kid until I played with a neighbor kid who did,

Ah interesting. That reminded me that my cousin also stutters and well when we played together, we both got worse after a while. My parents noticed that. I also noticed after I watched or listen some stutter, I'd stutter more. I wonder if that that's why I never really wanted that Kings' Speech movie. I think I maybe be unconsciously afraid of picking it up...

Oh and I also speak other languages too, and have wondered if it that made it worse. That is having to learn two at the same time when I was a child.