@gormadoc
First, I never said evolution had "stopped". I never even implied any such thing. We're certainly still evolving to this day--I suspect right now one prominent direction is for toxin resistance because of all the pollution. But in big slow-breeding creatures it takes time. Sure, a couple of little things, some blue eyes here, an ability to digest milk there, and certainly there have been lots of changes in what diseases we're resistant to. Big deal though--modern Asians don't have a lot of genes for blondeness or milk-digesting. That time had fundamentally modern humans; they would not be particularly genetically shorter or squatter or shaggier or have different skulls or such.
There are certainly going to be some issues making it hard to generalize studies of modern hunter-gatherers to past ones. But I think to some extent you have it backwards--if we want to study hunter-gatherers today (or even fairly recently), we can only study ones on crappy land that nobody else wants, or in restricted territories that do not, for instance, allow them to move around in response to local food shortages as they once would have. I live in British Columbia, which had some amazingly successful hunter-gatherers because it was such rich territory--very productive rain forest, with coastal waters also full of food. Unfortunately for the first nations, we white folk totally agreed with them about what excellent rich land it was, so we took it and their ancestral lifestyle is no longer available to study directly.
But sure, hunter-gatherers most places no doubt went hungry sometimes, even starved. As did agriculturalists. But agriculture tended to cause malnutrition even when it was working as planned; the diet was too narrow and the surpluses tended to be extracted too thoroughly by upper classes.