I think the question isn't so much how it works with that (as in you are pointing towards it just not working) and instead just how well it works with that.
Do you have numbers on how many consumers in say NA, various European countries etc are behind CGNs? I would guess most are used by mobile carriers (but I have no data) and I would gather that this particular technology is not going to be used to try and associate random mobile users anyway. It's more about who likely lives in the same household.
Google has that covered since many of those behind CGN are also on networks with native ipv6. Many mobile networks have already made the switch - dual stack to the handset with native ipv6 and ipv4 handled via CGN.
Googles interest in ipv6 isn’t entirely altruistic after all…
Do you have numbers on how many consumers in say NA, various European countries etc are behind CGNs? I would guess most are used by mobile carriers (but I have no data) and I would gather that this particular technology is not going to be used to try and associate random mobile users anyway. It's more about who likely lives in the same household.