That's not your large scale study because they are focused on something completely different--namely max weight. A 135 lb clean and jerk is quite light in the grand scheme of things, but it can do a whole lot for your fitness when viewed in a holistic program that includes other exercises. Anecdotal evidence may not have the weight of a large-scale study, but it's not meaningless. In the absence of any other evidence, it is an indication that the mean probably tilts towards one side. And I have yet to see any real evidence that high rep olympic lifts are dangerous other than the non sequitur that they're complex motor movements.