He's never given out his name.
And who cares what his training is?
He's one of if not the most respected Sabermetrician outside of Bill James.
I care about his training, sorry. Nate Silver has credentials. How do I know he's just one guy. How do I know a team has hired him? In 2010, you can find out who anyone is. I bet it's a bunch of different people. Seems like their methodology is pretty standard which is comforting without doing too much digging.
I also wonder how aging curves change without PED's.