I'd love to see what more knowledgeable people have to say about this. Intuitively, I think he's missing the point that those who develop back problems from squatting get it from not being a stickler with technique, and one false move on a bad day leading to disaster; and that back problems related to squatting has little to do with spinal compression. But, I can't back that thought of mine up ... maybe someone should repost in exercise physiology section.