I don't think Facebook is able to get away with that, at least not as easily.

With Google my #1 concern is they'll shut it down. With Facebook I know it's going to sniff up all my data it can get its grubby hands on (which is also the #2 concern with Google if the product survives)

In any case on the subject I don't want anything but my own hardware processing anything thought related. That is not something the cloud should be involved in