That's a very long document. Can you point to the exact place where they allege that they have "a lot more access that any other web analytics firm"? I tried searching for "access", "geolocat" and "deanonym" and none of the hits describe anything like what you claim is alleged.

So can Facebook. Should they add that disclaimer on the incognito page too? If you're going to argue that they should call out Google analytics specifically, then you're saying that they should have a comprehensive list of every tracking company out there. But why? They've already made it clear that websites can still track you in Incognito.