have not witnessed this yet.......
I put the B24 in a dive and turned on CT, when it reached 350 the nose started coming up, even though I kept the stick pushed all the way forward. once it slowed to 300 the nose started to drop again
the Ki84 I got to 400+ ( bleeds speed quiet well) and did not have any damage turning under moderate G load ( 4+) holding the tunnel of bout 3" dia (combat trim off plane trimmed for 295 speed level flight)
I guess if you yank and bank and jerk and stir you gonna rip parts off, if you fly smoothly fast, you still can pull moderately high G's
just my opinion