no, the forum account was hacked to make that claim. It wasn't by Satoshi.
Are you sure, I wasn't aware of that?
Edit: the "I am not Dorian Nakamoto" was on March 7 2014, the account hack on Sept 8 of same year. It doesn't prove it conclusively. In fact the hack may well have been done deliberately, for a (kind of) plausible deniability (i.e. now you can't tell whether it was the real "Satoshi" and thus there was no provable breach of secrecy).
Discussion at the time: https://www.reddit.com/r/Bitcoin/comments/1zrshb/real_satosh...
The consensus is that it was not from the real Satoshi.
In fact the reaction to that forum post are the same as the reaction to CSW's claims: Sign it or it's worthless.
Good point. But on a second thought - signing it might have been in violation of whatever secrecy requirement, possibly a crime, under this theory we will never ever see anything signed from Satoshi.
With that view of the big picture I would be surprised if someone would throw away what may be the most valuable numbers in history, let alone the only proof that they created it while purposefully remaining anonymous.
Mr. Wright made his claims but now is unable to prove them beyond a reasonable doubt.
It would also explain the silence - the project is over, the team is probably bound to secrecy because this stuff is classified.
The only time Satoshi spoke out (edit: and we don't even know that it was authentic, see discussion below) was to help the poor bloke who was mistaken to be Satoshi and his life was being ruined, and that was probably a collective decision by the former team members, it was the right thing to do.
This is a different case - Satoshi speaking out wouldn't help in this case, Craig sounds like someone in need of help from a professional psychiatrist or psychologist, http://www.drcraigwright.net/ almost sounds like a suicide note. I feel sorry and worried for the bloke.