Quote from comintel:
Yes, he says in the webinar that it is only in the past 6 months to a year that he has adopted the new approach.
He implies or says that he is no longer using the approaches in his book. It is interesting that most people are undoubtedly still reading his book without knowing that. He does say that this webinar was a way to let people know.
It is evident that he does very comprehensive statistical studies of option prices. He talks about how precisely aligned many prices are to their theoretical values, yet with the weeklies often underpriced currently. It is evident that he is basing his views not just on his trading results, but on very comprehensive statistical studies.
I guess there is a risk that this behavior will change again, and the best way to know on a timely basis might be to do your own studies. Probably some people who are active traders can do it by market feel too.