This is a topic dear to me, and something I have written about a fair bit on my blog. In an article recently published in The World of Fine Wine (Issue 51, 2016 Q1) , I draw together my thoughts into a coherent form, and refer to research that I have more recently become aware of. If you subscribe, or if you can lay your hands on a copy, please look out for the article. Impatient subscribers can also find Issue 51 online now.
Update 05/10/16: The article is now available for all on The World of Fine Wine website here: Subjectivity in Wine.