Although he also claims to have a LOT of requests that were sent via e-mail, outside of the forums (and presumably not represented by the spreadsheet). So it's difficult to say with any certainty.
I think he wrote that emails and PM numbers *included* duplicates.
Currently pending
221 pending refund emails (including duplicates/spam)
98 pending refund PMs (including duplicates)
IMHO, After nearly 3 weeks, and with people touched where it hurts (money), I would say, that we have around 7-80% of the victims on the spreadsheet... It would make sense, statistically.
And it would confirm what BTC-ARBS saying that
... The total value of ALL BTC-Arbs accounts is more or less 500 Bitcoins. ...There are only 7 users with balances over 20 Bitcoins. ...