I hate the title because it is linkbait for the obvious conclusion, which it does reach: Pre-school and school performance is so dominated by non-sheer-smarts characteristics (such as the ability to concentrate on a long test at an early age) that trying to derive any meaningful conclusion about gender/race/size-of-your-nose outlier intelligence patterns is almost moot.
Not only are most people not geniuses, but most successful people are not geniuses either. What's with the obsession already?
The obsession people have with 'genius' is due to a misguided understanding of what genius is and an assumption that it somehow makes life significantly easier. It's the same obsession people have with the lottery and believing it will solve all their ills. Smarts and money are both capital; through hard work you can get more.
Not only are most people not geniuses, but most successful people are not geniuses either. What's with the obsession already?