I'm the author. I think I made the distinction quite clear. Surely I understand concurrent means several independent components working in parallel and not parallel execution of code on CPUs. Did you read the whole post?
I'm the author. First, I'd like to point out that I started out as a programmer for embedded devices.. so I did know about the parallel nature and powers of two. BUT, I do know lots of programmers who don't. My intention was to teach those who know nothing of computer hardware and are asking these questions. Hopefully you'll be less grumpy now. (: