That study controls only for habitat quality, which I feel is not really relevant: hunter-gatherers are, by definition alone, nomadic. They move to where the fo

That study controls only for habitat quality, which I feel is not really relevant: hunter-gatherers are, by definition alone, nomadic. They move to where the food is! IOW, hunter-gatherers follow the best habitat, so controlling for habitat is always going to have the conclusion this paper reached. I'd be very interested in other studies that support this conclusion; after all, that's how science works - a single study proves nothing if many studies conclude the opposite.