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Within two standard deviations of the mean? Yeah, no, not really. With outliers, +- 3 SDs? Sure, but you're either too clever for more IQ to appreciate to better life outcomes or too stupid for it to matter, and it's not like most people will spot the difference, either.
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If you're at such low IQ levels that it starts to interfere with basic skills, sure, 5 points of IQ in either direction can certainly make a difference. For ordinary people, it really is only significant to Mensa members thinking that their jump from 1/20 to 1/50 matters. Dumb.
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