They are in full resolution now, but FB compresses pictures pretty badly, probably the worst out of all options. The unicorn picture is now a jpg after FB converted it and it is about 300kb big. Pngs are usually about 3mb big. That's roughly a 90% quality loss.

If you don't want to open a free Flickr account (which I would recommend) or an Imgur account, better upload it to Twitter than Facebook.
But really nice captures!

And, yeah, I was missing The Witcher after finishing B&W very much too. Even more so because B&W was such an amazing ending. I'm looking forward to how you'll find the little present from the developers at the very end, hehe.

Hope no one has spoiled it to you yet.
Some of my pics: