It certainly sounds like an interesting chat. I'm not sure if this has been brought up before but I do believe the GDW staff got the idea or at least source material from a study done in 1979. One attack scenario studied was a 10 missile attack on US refineries. I have the book someplace in the garage.
It was commission by the govt. A link to the PDF is here, look at attack scenario II.
http://www.nuclearpathways.org/Docs/pdfs/7906.pdf
This a must read for any fan.
As for Jericho I think the real killer of American society was the EMP blast 2-3 episodes into the series. Once that was done, assuming it was nation wide, recovery is an unlikely event and new nations rise from the ashes.