To be fair to Gavin it looks like he wasn't really paying attention to how Wright was playing things and now admits he got it wrong:
https://dankaminsky.com/
I was as surprised by the ‘proof’ as anyone, and don’t yet know exactly what is going on.
And it was probably a mistake to even start to play the Find Satoshi game, but I DO feel grateful to Satoshi.
If I’m lending credibility to the idea that a public key operation should remain private, that is entirely accidental. OF COURSE he should just publish a signed message or (equivalently) move some btc through the key associated with an early block.
Feel free to quote or republish this email.
"early block"? No, not good enough! Any block other than the genesis block could have been mined by someone else. Gavin should know you can't move the coins from the genesis block, so the only option is a signed message from the genesis block.