All indications point to Intel doing this solely for a publicity stunt. For a publicity stunt, they only need to make a handful. The statement of Intel having made 4 units only is very specific and pointed; There is no evidence or reason (outside of your incredulous imagination) to believe that it is incorrect; It should be taken at face value by default, and if you want to dispute it, the definitive way to do so is with facts, not speculation.
Why don't you write to the author for confirmation, and let us all know how it turns out?