EditorialGuy - 6:15 pm on Aug 8, 2013 (gmt 0)
major surprise to me, one of the publications that I feared might be too far from the mainstream to be considered (I've never seen it appear in Google News, eg) was the source of one of the three articles
That's good to hear, and it supports my belief that the current "In-depth articles" examples from the likes of Forbes, The New Yorker, Business Week, etc. are just the tip of the iceberg. I think we'll be seeing a lot more "In-depth articles" SERP boxes for a wide range of informational topics within a few months (if not sooner).