Edit:
I've never read Satoshi's PMs.
Can't find it, maybe I remember something wrong.
What if theymos is Satoshi

Satoshi started the forum and continued as
satoshi. Later he realized that he needs to hide (whatever the reason). He started to plan for it. He created the account
theymos and established it (publicly trained the account). Once, Satoshi found the theymos account is good enough (publicly) to make it an admin then he retired from the satoshi account.

Would you make
a complete stranger the admin of your site (?) no matter whatever level of excellence they have?