I honestly have no idea, and the page on cookies does seem to say that they don't allow google to use the data or do much with it, but that just raises further questions as to how they could ever enforce that.

I guess I'm just very suspicious when personal data crosses borders.

EDIT - also wondering what you mean by a separate deal? If the data goes to the US it goes to the US and is then subject to US laws (and no longer subject to EU/UK protections, deal or no.