The cracks are real. When you pick up a C-check, Boeing shows the pilots engineering drawings and/or pictures of the cracks and how much they're propagating. Did this maneuver cause them? Who knows. But if other DC10s have them (which I don't know if they do) then I would say no.

We've over Gd two jets due to aggressive TCAS RA maneuvering and it caused physical damage to the horizontal stabs. Pieces of the horizontal stabs departed the jets. I believe this is why they now fly TCAS RAs with the autopilot on.