If you walk into the head office of Qualcomm (in Sorrento Vally, San Diego, CA) and you see the the "Patent Wall" in the entrance covered with almost 1400 patents, it's kind of hard to wonder just how open Arduino will be.
You are right - the whole blog entry has zero names mentioned. An anonymous opinion piece indeed.
Could have almost been written by AI, but the content seemed so angry that I think it must have been a corporate spokesperson who just woke up, read people being concerned and angrily hacked away at the keys at the keyboard.