Nothing official, and they would never release that information.
Also, the ones that join forums are usually joining to say they have a problem, not say how great their truck is running. Many, many EcoDiesels out there that are having no problems.
Welcome!
Since you're running GDE tuning, I would contact them and get their opinion on the sound to see if it's something they have heard before. It could be a bug in your tune file that has a little to much timing, etc.
I was being a little conservative! You're right, either way is no good. I've seen some folks actually drill a small hole in the side of the port, and put a small suitcase style lock on there so if anyone tries to plug something in, it won't make the full connection.