Oh they definitely are. A lot of people are now calling out real photos as fake. I frequently get into stupid Instagram political arguments and a lot of times they come back with "yeah nice profile with all your AI art haha". It's all real high quality photography. Honestly, I don't think the avg person can tell anymore.
I've reached a point where even if my first reaction to a photo is to be impressed, I then quickly think "oh but what it this is AI?" and then immediately my excitement for the photo is ruined because it may not actually be a photo at all.
