Like I said, obviously not a product of an audit team from Delta Air Lines. This dubious document has been touted as the gospel from ATL by some gullible folks here and elsewhere for quite a while now.
You can BS the fans, but you can't BS the players...
Over here in the U.S. we don't worry too much about loosening neckties and armrests. Or turning off our nav lights during the day (maybe it's a Cessna thing).
We set our clocks to local time since we never fly to Green-witch.
Why, we're just a bunch of country boys tryin' to earn a livin'.