Yes, the third citation is a transcript of his talk in the Future of Bitcoin conference. For those curious, you can also watch it on Youtube [1] (warning: maximum cringe).

He mentions the PGP key, but only connects it to the Australian Tax Office (which he defrauded, and is now living in the UK). I'm not sure how that's supposed to change my conclusion.

[1] https://www.youtube.com/watch?v=YAcOnvOVquo&feature=youtu.be...