Not to my knowledge; though some people have some theories of possible entities.

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The 3%~ figure comes from assuming:

A. The distribution was shuffled before sending; i.e. it is randomly distributed over distribution blocks.
B. Claims are proceeding in an ordered block-by-block fashion.
C. The percentage claimed from previous blocks.
D. The assumption that blocks "ahead" have not been previously claimed by the user.
E. The assumption that blocks "ahead" will be claimed eventually.
F. The assumption that, given the random distribution, blocks "ahead" will contain proportional claims.

So, a few assumptions are being applied to come up with the estimates