Most damage I've witnessed is in mostly residential panels. Specs usually 250in lbs on mains, that is not much at all, seen guys not using a torque wrench thinking that you wrench tighten. Most times if torque it out, ends up in neighborhood of 60 ft lbs. 3X the recommended torque. No gorilla needed to do that.Ah, that's not simply over-torqued and I wouldn't call it such; that's flat out strand damage. For a spec of 400 inch-pounds (33.3 ft-pounds), cranking to 500 is 25% over but probably isn't going to break any strands. OTOH double-torque might well damage the strands.
Or, there's over-torque and there's gorilla-arm massive over-torque damage.