I don't especially doubt the 80% statistic. I do think it's far overstating the evidence to say that it proves the author's thesis. I think it is far harder to prove the causes of poverty than it is to prove the incidence of poverty. I probably could have been more clear about this. The fault I find with the HuffPo prediction is overconfidence and under-skepticism about the ability of their data to say what they claimed it did.