Google is different. Not perfect, but they really have a data liberation front.
Facebook is different too. They don't pretend to be nice. They'd take their users' ovaries if they could get 'em.
I was struck by that when I decided I'd try to download a photo I'd put on FB. Right. No export option.
There's a way to do it though. Marteydodoo.com - Photo Download is a free OS X and Win app for retrieving images from Facebook.
So Facebook could be even nastier than they are. Still, they're bad.
Update: When you retrieve your images this way you still lose the image metadata, such as date and location.