That really is an interesting article. I'm always amazed by how far people will go to solve a single question, in the name of science!
The question that came to me as I read it was: I wonder how diverse their panel of test subjects was? For example, the comparison of two groups of people in regards to "sound annoyance levels" was fascinating. People who are exposed to "annoying" sounds every day seem to have a higher threshold for sound annoyance than the people who aren't. This makes me wonder how much sound perception really relies on upbringing, exposure to certain elements, and daily habits. So having a test group of people with a wide set of lifestyles, cultures, ages, and so on, would produce a more rounded view of how "humans perceive sound" in general, than a more homogenous group of people.
I liked the plug for B&O's speakers!