Ah yes British, the famously direct people who say things like "Maybe I haven’t explained this very well", "I’ll bear it in mind", or "How interesting!" which anyone unfamiliar with the culture would interpret to be the opposite of what was actually meant.

"I may be wrong", but perhaps 'Americans rarely sound authentic' to you simply because you're just more familiar with your own culture's idiosyncrasies?

Anyway, I love the Brits; no flame intended. I come in peace! :-)