[stouset]

They might have actually done it, but my point is that the incentives for companies to do so generally aren't there. And as long as there exist some large sites that believe the costs to adopting IPv6 exceed the benefits, ISPs will continue to give IPv4 addresses to their clients.

[Symbiote]

My phone's IP is in the private 10 range. A request to Facebook must go through the provider's expensive NAT router.

If they assigned my phone an IPV6 address in addition, that traffic could go directly to Facebook through cheaper switches, which is faster for me, and cheaper for them.