There are many assertions of facts in this blog article, for example: 75% skilled pragmatists. Do any of these facts have citations? Even if the author were t

There are many assertions of facts in this blog article, for example: 75% skilled pragmatists. Do any of these facts have citations? Even if the author were to directly state they are his observations as a developer, it would have more value than absolutely no citation. As written, these facts are giving me a very made up or "story time" vibe.