You are correct. I should have said "nearly every one of..." instead.
(I want to avoid claiming that it's the racist claims that were proven untrue. For one thing, it begs the question: if they turn out to be true then I guess it wasn't racist after all.)
You should re-phrase that to point at racist claims. There are quite a few differences between the races. Bone density is one example.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1863580/