When I access a page using a web browser, I can see more information from a non-friend of me user than I can see if I try t get information usin Graph API.
For example:
Accessing the page http://www.facebook.com/profile.php?id=100001514767572 I can see, for example, the location where she is living (São Paulo).
But if I tried to get the information using Graph API, I could not see some information for the same user (https://graph.facebook.com/100001514767572?access_token=XXXX).
PS: I already selected all permission when I got access token.
Facebook doesn’t want it to be too easy for developers to farm certain information.