Make sure to do 100. I did 12 early and got 9/12 for paintings and thought it was trivial. I redid it and went to 100 and got 71/100. Hard but still discernable. Oddly enough I actually preferred midjourney over humans a lot of the time which made it easier to determine which ones were AI generated. Midjourney has a very distinctive style. The hardest to distinguish was Dall-E2 imho.

I wonder though if I wasn't familiar with AI art how I would fair. I used a lot of meta knowledge (midjourney oversaturates, image generators struggle with hands and eyes, image generators struggle to tell a narrative etc). I bet a rando non artist who hasn't followed AI art would score in the 50-60s range right now. Gonna send this to family and see how they score.