I got the 100-200g figure from an earlier posting that mentioned those figures in relation to injuries seen on recovered bodies, which in turn I thought must have come from BEA or authorities close to them. I can’t quickly find the quote.
The people were in the same fuselage areas as the galley, both remote from the immediate impact with the sea; and the lower parts of the fuselage would act as energy absorbers, but also with the whip crack possibility mentioned above enhancing velocity, and ultimately g as movement ceased; but it still seems remarkable to me that such a disparity can have occurred. I do know that queer things can happen in accidents. I have seen a very small number of aircraft and car accident details, but none of those led me to conceive of an anomaly such as posed here, if the g reports are anything like correct. One or two passengers may have experienced a particularly high and thus atypical g, but I am surprised that it seemed to be the norm, when the galley was so little damaged.
Anyway, thanks to those who responded.