Andy Kev.":jb5itsea said:
........surely we cannot deny it as a matter of fact........
Nor can we yet accept it as a matter of fact. His tests are insubstantial and subjective. That doesn't mean that the results are wrong*, just that until the tests are done properly, many times over, and by other people, they are nothing more than a claim. They aren't helped by over-blown claims of expertise amounting to an argument from authority, one of the classic logical fallacies.
*You'll notice that at no stage have I ever suggested that what DW has come up with is wrong. My argument is that his tests are weak and so his claims are subjective.