body => question => [creation_date] => 1254969799
1254969799 == Thu, 08 Oct 2009 02:43:19 GMT
I think something's up...
No, money.stackexchange is the first site seeded with the content of an older, SE 1.0 site. Accordingly, some of the content is "older" than the site itself, as are some of its users.
In this case, BasicallyMoney (now redirects to money.stackexchange).
There's a meta.money post about it.