Since Bitcoin was created in 2009 there were lots of speculations about the founders. There are several versions but no one of them was ever juistified.
A possibility is, Satoshi Nakamoto is only a synonym of a group and the single person "Satoshi" never existed. They gave the name to hide their identity like Bitcoin was designed itself: a private currency sharing no information who the sender and the receiver are - just peer to peer without a middleman - without banks!
On the other hand, this forum was founded by "Satoshi" himself, his account has the user-ID number 3 and you can still read his comments!!
https://bitcointalk.org/index.php?action=profile;u=3His activity ended suddenly in December 2010 and his account never entered the forum again...
Somewhere I read an analysis about his posting activity and the time he did his posts. It is possible that he is from the American time-zone and only choose this asian name to cover his tracks, but it's also possible he's from asia now living on a different continent. There is so much space for interesting hostories and if Bitcoin will be a success history (that's very likely as it's already close to one) there will be much more versions of new details and maybe we'll discover the truth - who knows

Regarding your question: there were several people claiming to be Satoshi or "accused" of being him. I believe this is another try to make some noise.