Anthropic's public writing style is very different from Claude's because it's written by humans. Even in their job ads they ask candidates to not use AI for any writing (or at least they used to).
Yes. AIs are a lot better at coding than they are at writing. I author less than 1% of the code I push these days, but still write the grand majority of emails and posts. Probably I would do it 100% human if it was high stakes and I expected it to be read by millions.
I only realised when I was told about it that, while for me it doesn't have that nausea trigger, it does have a bit more alert associated with it — which is probably why I made my comment at all. I am not emetophobic (might have risen to that level as a child).
But having an awareness of that alert feeling is a very useful mental model for how some other words or phrases may cause a heightened response with different parts of an audience; it is a useful caution.