I've been wondering the same thing. It's a long thread, so maybe I just missed those comments? But I don't recall reading anyone make that claim either.
I've read some arguments over whether or not one can improve at all over one's current level at two times a week, LOTS of arguments over the psychology and motivations of people who train two times a week, some arguments over whether and how these people harm or help the art as a whole...
But no claim that I can find or recall that one can eventually, e.g., meet or exceed the level of the current highest practitioners training two days a week? Is it there somewhere and I missed it?
I never said that people are claiming that they can master it with two days a week. I've constantly affirmed that more than two days a week is required to gradually get better. And that a teacher has the right to demand a minimum amount of hours from his students.