If you have another DA account, you can log into that and then refresh your profile page. Or ask a friend to visit your page. If you're logged in as this account, the greeter won't ever greet you, of course.
Ah, do you mean always displaying an actual username instead of "visitor"? The greeter now only shows a name during the minute when the visitor arrives to your page. I made this change to make anonymous visitors (anyone not logged in) be greeted with "visitor" and not somebody else's username.