AI has come to the point where I only have a "gut feeling" it is AI because it looks so polished and weird. But there are many other (stolen) art-styles that look completely different and I wouldn't notice if no one told me.
you cannot sniff them out anymore by just saying "look at the wretched fingers"
The lighting is always way too good, looks like a model shoot or 3d animated movie where a team of people spent ages tweaking all the light positions and brightness.