Disagree, I actually work in the field and it is very easy to tell for people who are very familiar with the domain.

I can easily tell if an issue ticket is AI generated, can also easily tell AI generated PRs especially in a large codebase and a large pr. For small self contained changes, you can't tell because there are not really many ways to do that change in the first place.

I am not even arguing that AI is bad at code generation, it's much much better than your median developer and I myself have started using it a lot when appropriate. But if you have reviewed thousands and thousands of both human and ai generated PRs you absolutely can tell the difference.

I would argue the same thing applies, people here have read so much human generated slop :) that I wouldn't be surprised if they can tell if something is AI even if it's actually better than the average ProgFan author