Richard Lynn says that the average IQ in India is 81. Yes, that sounds like a very low number, lower than the average American black. But Richard Lynn also says that the average IQ in Nigeria, the country in Africa where American blacks came from, is only 67.
It’s clear that when people in undeveloped countries take “IQ tests,” they don’t do as well as when people from the same gene pool take such tests in the United States. So we shouldn't take take the 81 number literally.
I think the evidence points to the average Indian being genetically smarter than the average black African, but not as smart as the average white European or the average Japanese. But because India has such a huge population (a billion people), there are a large number of Indians whose genetic potential puts them on par with the average American college graduate despite the lower average IQ for all Indians, and these smarter Indians are, predominately, the Indians who move to America.