In reply to Scott Hartley.

@Lara, you are right. After some research I realize they used to be a WordPress-only, but now it has changed. "For the NYTimes blogs, that meant moving from a WordPress-only service to WordPress as an app inside of the new NYTimes platform." (http://open.blogs.nytimes.com/2014/02/04/rethinking-blogs-at-the-new-york-times/) It looks like they use WP API and have done tons of customization. I guess that is why there is no "wp-content" those WP "signatures" in the source view of their pages.