Chris MessinaGoogle has the same or similar data. It was always a challenge to figure out how to display data that you provided about someone (on their Google+ profileSee more) versus what they had contributed. We tried to make this clear by splitting it out but people found it hard to understand in practice.
Timo SalorantaEye opening article! It hasn't been well communicated or understood that Facebook combines the data you have told about yourself to what other peopleSee more have leaked about you from their address books. The fact that Facebook keeps all the address book entries uploaded forever has some very surprising, unwanted consequences; it can reveal connections between people without their consent.