Comcast Will Finish IPv6 Upgrades Early Next Year → Re: A Leader Here

Being years behind the curve is not an early adopter. It is more like dragging their feet less than most of the rest of the industry. It is also debatable how much they really spent. They did not replace their CMTS gear and if they did replace any other network gear it was part of their refresh cycles to do network upgrades; as in it was not specifically for v6 but it could benefit the roll out. What other spending they did like CMS integration of certain aspects of v6 provisioning and such is just part of doing business.

We could say everyone is behind the curve as IPv6 makes up, perhaps, 1% of Internet traffic? The fact is, at least in the US, no other consumer-focused ISP has gone as far as Comcast has with regard to IPv6 and there is a massive learning curve in doing so—not to mention all the issues uncovered as they went down this route—and the time people spent on this stuff cost money as well. Most of the other consumer-focused ISPs are simply waiting for companies like Comcast to do all the time consuming leg work and then take advantage of the lessons learned.