No, they've actually done studies. The average black IQ is lower than the average white, and the average white is lower than the average asian.
It's kind of taboo to talk about because everyone gets all PC on your ass because they don't want to look like a bigot. Not all people are identical to one another. Some are less intelligent, some are more. Doesn't mean any are less of a person. I'll support the rights of everyone, until they lose their ability to feel pain and become mindless flesh-eating zombies. In which case, I will shoot them.