Looks like every other website to me, even before Claude was a thing. IMHO new sites have looked like this for a long time.

I think it's less of a distinct aesthetic rather than having "Tells" in the template that you might be sensitive to for having worked with it.

I've seen word documents that the first time I saw them I thought nothing of it. Wasn't until I had ChatGPT work on something later and noticed it's exact use of particular fonts and colors that I realized the other was AI generated.

There was nothing materially wrong with the documents, but after seeing the connection you can't unsee it. It's not really a new or AI specific phenomenon either, any template can trigger it. like how every RPG maker game looks the same, or every substack blogs all are samey, even on custom domains.