That is the first thing I checked (and rechecked 15 minutes ago). The main admin account number is set to number 2, my account... Really! :-)
To re-check I just 'became' some new user, looked for the welcome message (Welcome, started by Krejt) and replied to it, it still shows "Poster: **DONOTDELETE**"
Well,... to test this a little more I made this new account right here on YOUR forums.... I logged in, read your welcome message and replied to it, and there it is;
Poster: **DONOTDELETE**
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QED