No,you should not have said that about racial differences,IT IS BOGUS
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Perhaps the strongest evidence against a genetic basis for intergroup differences in IQ is that the average level of mental test performance has changed very significantly for whole populations over time and, moreover, particular ethnic groups within the population have changed their relative positions during a period when there was very little intermarriage to change the genetic makeup of these groups….
Perhaps the most dramatic changes were those in the mental test performances of Jews in the United States. The results of World War I mental tests conducted among American soldiers born in Russia–the great majority of whom were Jews–showed such low scores as to cause Carl Brigham, creator of the Scholastic Aptitude Test, to declare that these results “disprove the popular belief that the Jew is highly intelligent.” Within a decade, however, Jews in the United States were scoring above the national average on mental tests, and the data in The Bell Curveindicate that they are now far above the national average in IQ.
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ME: I hope you realize there is no peg for IQ 100, it always represents the average, so among Neanderthals 100 is average, and among US citizens 100 is average BUT our 100 is miles above the Neanderthal. Do you know this? George Bush senior did NOT !!!