My impression is that there are a lot of unlikely claims in his argument and he lacks important knowledge of Bitcoin.
I'm one of the panelists, and also was present later when people asked the guy questions post-panel. He was interviewed by journalists too, and there has been nothing published about this so far, they probably don't believe him either. He doesn't claim to be Nakamoto, rather that he had the idea of an anti-bankster cryptocurrency, wrote the requirements and hired Nakamoto to code it. I forgot his name, but he claims to be a German living in Munich. Allegedly, Satoshi Nakamoto is the real name of the developer, and he paid him to a bank account in the US for the development. He had bitcoins worth "100 million", but lost them when his laptop and external hard drives was stolen. He was unaware of the utility of the proof of work concept (rather he claimed it was supposed to be a marketing gimmick) and the 51% attack (i.e. no idea about the byzantine general's problem that Nakamoto solved). Satoshi allegedly promised to remain hidden until this German reveals himself, and is supposed to reveal himself now too.
I don't think so.