I haven't been on the front lines of new protocol deployment for a long time now, but the pattern then (and it appears unchanged) was that larger deployments brought out 2nd and 3rd order issues with the protocol. The old joke was "How can you tell someone is a pioneer?" answer, "Count the number of arrows in their back." which expressed that folks who adopted new protocols bore much of the burden of their failure and revision. Sounds like CSAIL has made some great progress in this respect.
There are already quite large both enterprise and service provider networks already using IPv6. It's more in-between the "pioneers did not document the thorns they hit, so the others would not" and "the future is not evenly distributed yet, so we don't know about it" territory.
I've volunteered myself to understand which of the two and to do whatever is actionable.
