So, does this actually correlate with IQ in any way (not that IQ is meaningful)? Or is it simply that 14% of the population can make the switch happen, and 14%

So, does this actually correlate with IQ in any way (not that IQ is meaningful)? Or is it simply that 14% of the population can make the switch happen, and 14% have an IQ of 160, and the author is making unfounded assumption that making the switch is a function of intelligence.