I fear that one would be misinterpreted by a significant percentage of American office workers.

And by an even higher percentage of overseas colleagues in some countries.

Agreed. Just ask the bloody question.

Look at the timestamps. That exchange extends over three days on that site, showing how useless it is in a subtle way.

Consider all the people who are naturally inclined or conditioned to behave like the example, and then consider that many of them will miss the subtlety.

Especially those who for whom American business culture might be foreign. "Oh, they have politeness and trust-building conventions, much like we do. This is more pleasant than Hollywood led us to believe. It seems the difference is that you also verbalize what you are doing in their conventions. Maybe that's because they are a nation with a diverse immigrant mix, so they evolved that to reduce misunderstandings, and to help integrate people to common conventions. That's nice of them, and I will be sure to emulate."

I think the subtlety on that page is tuned for humor to those who already know, not to educate or persuade those who don't.