Yep, I saw the article, that's the reason for asking this thread question. I haven't see any, yet.
I was in a high-end property recently that had some wall to wall carpet that looked like zebra hide! And in the same property, several bedrooms carpeted with what looked like Arran jumper type woven wool. I didn't test as I wasn't asked to clean it (just quote)... I've no idea what the type/value of either were.