Yes, but also remember that Twitter has a lot of non-web activity that would be completely invisible to Analytics

A truely paranoid individual would see this as proof that google is just pretending not to know...

This is very interesting then that Google gave up urge of cheating, and actually follows the rules.

Imagine what Techcrunch, the fence of the internet, would do.

Perhaps they could send some sort of harmless-seeming emissary to ask for the information they're already stealing, so Twitter will be more certain they don't have it.