@phusis , that is a very valid question which has a very politically difficult answer. Many people already think I am an arrogant SOB and from their perspective I am and nothing is going to convince them otherwise. So, in short, Mr Turnbull's system is not even remotely close to accurate. This is not saying that it is not pleasing to listen to. I have spent decades listening to my own pleasingly inaccurate systems. The people who are listening are surprised a small system like that can sound so good, the Bose Effect. When presented with a current SOTA system you get comments like "G-d, it sounds like you are there!" "I have never heard anything like this before." I never knew a system like this existed" and so forth. You get the impression of a true sense of wonder. Does a system have to be really SOTA to generate this sort of reaction? No, but it is a good indicator.
It all comes down to experience. Most audiophiles have not worked in the business and are busy with their own jobs and life. They have minimal exposure and very few systems are capable of the kind of performance I am talking about which again does not mean other systems are not pleasing to listen to. I worked in an ultra high end store and in my own experience I have only heard three systems that reached this level of performance.