I emailed Doug Frost, Master of Wine and Master Sommelier (and one of only three people in the world with that dual distinction) for a comment. Here is his response:
Eapen - yep, I saw it and there's no question that differing judges have differing responses to wines. And that some judges aren't consistent. For one of the competitions I run, we have a qualifying test in which the potential judges are given nine wines to taste and rank. Then they are given the same wines two more times (in a different order each time) and told to rank them again. Selected judges either get it right 90% of the time or more, or some have a score of perfect. Those are the judges we like.
I think both Karl and Doug are worth listening to...Hopefully the publicity surrounding Karl's work will be very useful in changing how wine competitions select their judges.