Some of the better posts from Eater's Burger Week:
In-N-Out vs Five Guys: The Big Chains' Bi-Coastal Burger Battle (basically a re-write of this article).
Breaking Down Five Guys Burgers And Fries By The Numbers (note to self: Talk to Wayne & Caleb once the McGill St. location has opened to see how it compares to DC)
Slutburgers Gone Wild! Carl's Jr. Ads Through The Years (self explanatory).