I read somewhere (and after 30 minutes of searching, can't find the original source but will keep trying) that at IQ 130, the correlation between parental IQ an

I read somewhere (and after 30 minutes of searching, can't find the original source but will keep trying) that at IQ 130, the correlation between parental IQ and child IQ was pretty high (ie. the mean parental IQ was ~127). But for kids at IQ 160, the mean parental IQ was only slightly above average (I think it was ~102). This suggests that there is a mass of upper-middle class professionals who have similar children, but that true genius (as measured by IQ) is rare and unusual, and usually more of a burden than a gift, given the lack of a suitable environment around that individual. So the success-comes-easily IQ 130 cohort are actually not the geniuses people laud them for being, and the IQ 160 cohort is probably just deeply misunderstood and comes from a (relatively) darker, more normal childhood.