Probably, but I don't think there's really any secret sauce they're sharing. Many of the factors are things every developer would come up with if they sat down

Probably, but I don't think there's really any secret sauce they're sharing. Many of the factors are things every developer would come up with if they sat down and asked themselves "what would I do if I wanted to rank these results?". Of course, the "how exactly is it implemented", "what weight does this factor have", "can I exploit how it works" etc is another story, but if you started building a search engine and wrote down your ideas about ranking and approaches to deal with some manipulation attempt etc, I'm sure you'd come up with a lot of the same things.