wordsum is a vocabulary based IQ test. Maybe the author refers to intelligent people rather than people with exceptional taste.
Though FWIW, I don't take much stock in the ability of most IQ tests to measure intelligence, since it seems a bit silly to put it on a single dimensional scale.
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[ 4.4 ms ] story [ 17.4 ms ] threadI think this shows the distribution more clearly, however, I still don't think that any of the demographic categories listed maps to "class".
[1] http://news.ycombinator.com/item?id=1313745 http://blogs.discovermagazine.com/gnxp/2010/05/people-of-cla...
Though FWIW, I don't take much stock in the ability of most IQ tests to measure intelligence, since it seems a bit silly to put it on a single dimensional scale.