While the IQ gap is pretty much confirmed and public knowledge, the question remains whether it's grounded in social reasons (discrimination etc.) exclusively or a mixture of social and biological reasons. Lynn is a rather controversial figure in psychology.
Living in Australia, so far I have not yet seen an Aboriginal person, well ... doing what everyone else would do. Sit in a restaurant, walk into a bank, sit in a lecture (or hold one). Every single one I've seen so far was sitting in a park with booze or strolling on the pavement with some friends and ... booze.
That's not meant to be discriminatory, that's just what I've observed. This said, as always in IQ there is a wide distribution and you'll find enough Aboriginal people with IQs >100 who are working as lecturers, civil servants etc.