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<p>Sure, and thus we see a few “average Joes” on CC - just as one would expect. But the reason why there would be a concentration of high-flyers is not hard to understand at all. CC membership is a self-selecting population. </p>
<p>I recall a thread years asking people how/why they first discovered and joined CC. Quite a few of them who responded said something very similar to my reasons: my daughter had taken the PSAT and achieved a high score, so I Googled to find out what the NMSF cut-off was for our state. That Google search pointed to answers posted on CC.</p>
<p>So if you are searching to find things like National Merit cut-offs that probably means that there is a high-achieving student somewhere behind that question. Google and other search engines send them (or their parents) here, and we like what we find here and decide to stay. If my daughter had been an average student with no chance for NMSF I never would have found CC. Never would have looked. No big mystery.</p>