That would be Theymos & Sirius if you ask me as I said above , I don't see how he will give the Administration of this forum to theymos if he don't really trust him and don't know him in real life , same goes for Sirius he made the forum with Satoshi so he should know him for sure.
Not necessarily. Wouldn't it be safe to presume that Satoshi used proxies, Tor, and other methods to mask his identity? Maybe Theymos and Sirius have ideas, better than anyone else, but maybe not certainty that it's actually him or not, right?