User blog comment:DaNASCAT/Technical Update: November 6, 2012/@comment-1474707-20121107213521/@comment-732150-20121108221400

Not sure if this still helps considering the change was reverted, but there didn't seem to be a specific pattern in which pages were flipped. What I can tell is that in the same RC page, I could see both flipped an unflipped links to both articles and their respective talk pages.