I suspect the hacker is bluffing. Just look at the way Bitcoin is set up, there is a paranoid level of security in key pair implementation alone - elliptic curve multiplication, SHA256, and RIPEMD-160 - he knows better than most that hackers will find a way. He would not leave such an obvious trace. IP Address maybe, but the hacker claiming "The fool used a primary gmx under his full name and had aliases set up underneath it" just screams bullshit.
Unless Satoshi wanted to be found. I imagine there could be a few benefits that come along with accepting the identity of Bitcoin's creator.
often times, its the most minor of simple habits, or things that do one in. not saying I think Satoshi is soon be to revealed ( the sum of its whole won't allow it ). but the theory that one who believes in and practices cryptology could not make a mistake is silly.
it's a nice piece of tech , a change of pace, and breath of fresh air in a stagnant world, but the creators are still very much human.