I think this is fairly obvious but there's a clear difference between "data belonging to a user" and "data about a user". The first is what they are talking about, because this is how vendor lock-in occurs.
That first link is hilarious. I looked at my 'interests' based on my searches and apparently I really enjoy Athletics and Chevrolet. Weird considering I don't like either haha
No, we just use a different definition of "user data" than most privacy and civil rights laws.
Or can I soon expect to be able to download all the data anything from Google+ buttons, YouTube to Doubleclick ads have gathered on me?