I saw an article referenced on the Wall Street Journal's webpage and found the analysis to be interesting (but that may be because I am a dork). Basically, they use the frequency each columnist uses specific, unique words and then apply that to individual columns to see if they can determine the author of the different columns.
I think the most interesting part was the list of the top words and adjectives/adverbs used by each author.
These are my definites. And since it's an even number, I'll make the logo DC this week. Batwoman #19 Superior Spider-Man #8 Captain Marvel #12 Supergirl #19 Maybe: Wonder Woman #19 Wolverine and the X-Men #27AU