i would like to ask you, would it have been breaking up when it was a mooney or a beechcraft ? Maybe yes, probably no
A conclusion reached how?? For my part, I'll say the answer is YES.
There's a design requirement to meet 50% more than design G loadings (so 5.7G) before failure.
[edit to add having flown a very few aeros 4+G is actually rather a lot to most pilots - really, it's not the sort of limit you just creep up on not realising! try it some day
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The reported details give no clue as to *why*, however, exceeding those limitations, suggests loss of control in some fashion, however induced (or doing something really daft, but let's leave that).
If out of control, it's most likely that the aircraft would exceed whatever the actual limits of the airframe were, EVEN if there was a little more margin in other types than the arrow - there's nothing to suggest the outcome would be different in any type.