The Upshot vs Vox vs FiveThirtyEight: is the market for explanatory journalism large enough?

GigaOM :: With the launch of The Upshot from the New York Times, there are now three major sites going after the "explanatory journalism" market. Each has its own unique flavor, but is the market for that kind of content really large enough to support that many sites?

Read Mathew Ingram, gigaom.com