Nice responses Suravi. The interest in the Weaver et al examples is specifically because of the hope that it may generalize to humans, so although most of their work is not in humans, we should juxtapose it to what we understand about the origins of inequality from human studies. The question of whether physiologic consequences of early life adversity can be undone in adulthood has huge policy implications, but very hard to really get at with humans because of the "stickiness" of adversity across the life course.
Maria