I honestly don't see why it matters whether Pathfinder briefly outsold 4e or not (I mean...it almost certainly did, depending on the unit of measurement - surely there was one day or one hour where it did, at least, so this is all kind of arbitrary). I don't think anyone disputes the main idea: 4e was a problematic expansion for WotC, and the rise of Pathfinder was part of the problem. This doesn't mean that 4e was a bad expansion or a worse game than 3e or Pathfinder or anything else, just that it didn't do what WotC hoped it would do.
Which, you know, they have outright acknowledged many times.