I've watched the whole Instawallet fiasco like a hawk because I had some BTC in Instawallet.  Only a small fraction of my holdings, and what I could easily afford to lose of course, but it's a personal affront and embarrassing to me to get screwed by (likely) criminals.  I got my bitcoins back with the first round of payouts BTW.

Whenever these things happen there are a handful of people (probably) who will make dubious claims and a lot of noise hoping that the party responsible will find the path of least resistance to just pay them off.  In PG's case it seems that his story was relayed early and has remained the same through the well over a year that this thing has been in play.  That is not what one usually sees when someone is trying to pull a fast one.  I think the odds are quite high that PG's story and claim is completely legit.

PG has been his normal self and obviously very frustrated through this adventure.  Not always a model of diplomacy.  That still does not give davout and boussac a justification to steal from him IMHO.  Nor does the fact that it would cost them a fairly large chunk of change to do the right thing.  (BTW, I would not rule out the possiblity that Boussac himself is a victim of davout to some extent.)

In the interest of being complete, I do have to note that PG seemed to go through a brief but suspicious period of shilling for the infamous scammers at BFL (between rounds of being their worst enemy.)  I forgot about that when I donated a bitcoin to the 100 charity thing a few months ago.  Anyway, aside from that I've seen no reason to be suspicious that he wouldn't do what he says.  I would love to see davout have to cough up the 1300 BTC he very likely stole, and I'd love to see the details of the collection remittance disclosed publicly.  And the details of the extraction for that matter.  If feasible.