Lol.
Ponz knows quite a bit about the Ponziani, which seems to support his authorship claim, but regardless, the burden of proof would be upon you to disprove his identity, not him to further defend it. As I stated, his credentials has been "tested" several times before. He's got an order of magnitude more credibility, in this case, than you have.
You might as well be a crowd bystander in St. Louis saying "I don't think that's Nakamura, he doesn't look like he does in his chess.com avatar...have you checked his ID?". Why would anyone listen to you?
It's not my goal to discredit the guy. If he is who he says he is, then more power to him. It just seems a little odd is all. If I was an IM or GM, I would not allow my TT rating to be that low for very long. I wouldn't stop until it was above 2000, at least. But that's me. I am all about the ratings. I'm about winning too though. That's why I study chess 80% of the time and only play 20% of the time. I have to always be improving and winning or I'll lose interest in chess. I'm like that with everything I do though.

My result in the Championship Round in the 7th United States Correspondence Chess Championship was 13 wins, i draw, and no losses.
I am the only player in history to win all his games with Black in the Finals of the United States Correspondence Chess Championship. This is a record which will never be broken.
It is very difficult to make it into the Finals as to do so you must come in clear first in a preliminary section of all masters and experts.
After that, i challenged a very strong internet team--their top player rated 2498--[he is now a grandmaster]