2 StuntPilot
I wonder where have your numbers (about fragments) come from?
In the DSB report, p. 92, Table 11, it is clearly stated that only 20 fragments were judged to be so-called "high-energy objects". 16 were of an "irregular" shape , 2 considered as "cubic" and 2 - as "bow-tie".
Quite poor statistics, especially as after so great deformation the output shape will not often match the original one.