Is this an AI response?
No.
I hate AI writing, so I never use AI for writing. Randomly throwing in accusations in discussions sucks. I don't think my comment had any of the hallmarks of AI writing either, unless bulleted lists are also not-done these days.
I guess I should be happy that people don't recognize me as a non-native speaker anymore?
Nah, some people are just having too much !fun! witch-hunting.
The accusation was not random. That writing had an AI tone to it with the bulleting etc, and didn't address the actual point being questioned.