I actually caught the authors of the book on the radio the other day, discussing this very same topic / these very same articles. (realclimate.org)
It's great how two different people can acquire completely different sentiments from the exact same article. (religion.blogs.cnn.com)
Inspiring article to use longtail, we understand such keywords gives good traffic but at some point can it be negative (copied content) to use 7 - 8 longtail in same article as they can be on other sites also. (quicksprout.com)