I guess I shouldn't have called it a "TSA announcement". The travel blogger claims that is what the TSA told him and that the TSA would be announcing the clarified opt-out policy soon. But it has been nearly a week and no sign of any announcement. I suspect that even if that is their real policy they are not going to announce it.

Here is the FT thread on that article BTW. Since some seem to have missed it.

So basically it is an uncomfirmed report of an alleged TSA policy. It's good enough for me to test out, but it may not be good enough for you.