This does not seem to me like a topic that's worth delving into. We shouldn't be trying to self-aggrandize based on something as fickle as "IQ score". Averages tell us precious little about individual cases, and the latter is where we live. So... nah, no need to concern ourselves with the IQ thing, especially not as it might pertain to stutterers. Like, real-world performance, that's what we should look at. How to get to doing the things we want. Nevermind sitting around thinking about being smarter than others. It sort of reinforces the idea that stutter is keeping us from showing how good we are, and that's not a good idea to focus on.