That said, your social group may set its own expectations, and you may want to fall in line, say in your job application.
So if what you speak is based on English, it's English (in my opinion - and by the way I am English).
Oh, and Shakespeare would have spoken with an accent more like an American than I do. But don't tell film makers, our actors need the work.
Would you explain what you mean by this, I'm very curious.
Not enough to prevent mutual understanding, but it can get close. As an American, if I haven't watched any British TV for a while and try, there's a good few minutes where I have to listen to most of it twice to be able to understand what was said.
"Almost completely"? Nowhere close. About two thirds of native speakers (maybe a little more of those on the web, but not much), and not even half of all English speakers: https://en.wikipedia.org/wiki/List_of_countries_by_English-s...
The underlying distribution doesn't matter when there's more activity from one stratum. The same way how it doesn't matter that the ‘average age’ of a Reddit user is in the twenties, when each teen on there posts and comments every ten seconds.
I don't know where Brits, Australians and English-speakers from all other countries are hiding, but they probably just use local communities away from the annoying USians. English web that you find by default is US-centric. English Wikipedia even has a special maintenance plaque for articles that are US-specific and should probably be rewritten someday—could as well just slap a sign like that on the whole English web.
When I see complaints on this very site about Californians assuming by default that everything is in California, I laugh heartily, tingling all over with schadenfreude.
EDIT: my bad, you were talking about native speakers.
EDIT2: well, no, my point still stands: the Total includes self-reported and vastly inaccurate additional language speakers. But based on how US is 2/3 of all native speakers, and that there's definitely many fluent-English secondary-language speakers out there, US is definitely not dominating English-language web.
For what it's worth, I have always described the language I speak as 'American', and it confuses people no end. ("Don't you mean 'English'?")
UK English being "proper" hasn't been a thing for decades now. Compare news reports in former British colonies from the 60s to now and you can literally hear the change in attitude toward's the "Queen's English".