Interesting article, and interesting response! Although you can dissect the article for flaws in the statistical analysis, you still can't get away from the basic fact that wine judging is a highly subjective, simply by its very nature.
A college English professor I had put it this way -- you can submit the same paper to different professors, and you're going to get different responses, and a different grade. That's just the way it is, grading essay papers is subjective.
I haven't entered very many competitions, but for the most part I was happy with the judging results, and there was a fair amount of consistency.
A side thought -- two excellent mead judges on these forums, Ken Schramm and Oskaar, are also expert wine judges. Can you be a good mead judge without having some expertise and/or experience in wine judging?
"Meon an phobail a thogail trid an chultur"
(The people's spirit is raised through culture)