Are you sure? I think it's definitely a significant enough amount to be mentioned with the others either way.

Not to mention the fact that a users interaction with Facebook is completely different from their interaction with Apple. Most people keep especially private data off of Facebook, but practically no I-phone user stops to think if a photo might be incriminating/embarrassing in the future before they take it. And that's just Photostream.

People backing up their devices to iCloud stand to lose even more.