[Dosenpfand]

Do we know with a certainty that it was him who denied it?

I think the real Satoshi would have at least signed the message.

[berberous]

Occam's razor says it is him. I don't think Satoshi ever signed any of his messages, so why start now? Especially when the Newsweek article is so clearly based on such extraordinarily flimsy evidence, that really, his denial should be enough.

[hackerboos]

Apparently the account is linked to the original Bitcoin paper. Timestamps can be edited though, it depends on the integrity of the site itself.