I hesitate to join in this discussion, no calcium or mathematics to back up my observations, but some time ago we installed a surplus "G" meter in a J3 Cub, a "Normal" category airplane. It may be stressed about +3-1 or so. We flew out of a fairly rough grass pasture and the "dead man" recorded over 6G just taxiing, twice the rated stress load. But, the wings didn't break loose.
It takes quite a man, or woman, even with a G suit to withstand anywhere in the 9G realm for very long, and it is incredibly uncomfortable. My reference is that USAF training film where the student passes out and the instructor isn't aware of it. dg