In the old profile page it was quite easy to find out if a user is unregistered. It simply said in large letters on the top of the page that the user is not registered.
Is it also easy to spot unregistered users with the new profile page? I've tried to look around, but I couldn't find any indication.
(And before people wonder why, this is useful because sometimes people suggest that a user do something that they cannot do without registration, e.g. vote up, delete, post a question on meta, flag; and it's quite useful to be able to know if these suggestions are moot.)