Sean van Berlo wrote:And the Art Adams article is relevant because the underlying principle is, as far as I know, is exactly the same for these cameras.
No, I don't believe the Art Adams article is necessarily relevant, since his findings are based on tests of a particular camera ("as far as you know" doesn't go very far), and he himself goes to some lengths in the article to qualify his conclusions, use this information at our own risk, I'm not responsible.
That aside, I'm familiar with your views. And I have views of my own, based on my own testing, which is at odds with received wisdom in places like the Facebook group. However, this question is being addressed to BMD staff, which provided the chart. I'm not sure why you can't accept that, without either objecting to the question or supplying your own understanding of the matter.