Earlier quoted context omitted.
Being English-as-in-UK I often run into situations where my dry/sarcastic humour completely fails to be clear to USians. Then again from the UK POV the leftpondians barely count as native English speakers anyway ;)
Yet you'll find sources that claim spoken American English is closer to historical British English, because of some aspects like rhoticity. [1] [1] https://www.bbc.com/culture/article/20180207-how-americans-p...
I was more thinking about the words/grammar/idiom etc.
(also as a Lancastrian I find e.g. Deep Somerset barely comprehensible, especially when the speaker is a few pints in, but their wording is still usually closer to mine than the USians' is)