Yes. But ISPs are blocking or throttling to oblivion, not prioritizing packets. BitTorrent has a proposed protocol addressing this and it was not embraced by the telcos, in particular Comcast who said was going to be working on that.

This proposal if sponsored by FCC or US Congress would give carte blanche to the telcos to do whatever they want on wireless, in particular 3G/4G. Google is not representative of the users (present or future) of those services.