Wasnt always claimed, the AI didnt treat the human differently? This isnt true. The average player is on the level of prince/king. Someone made an excel sheet to track the outcome of games like a year ago. And the average player hovered at around those both difficulties. Lets assume most "bad" player are not visiting the forum and reporting their games, I think we can still say most average players are playing on prince. Ive introduced a friend which never played civilization, and he was pretty fast able to win on prince. Sure, he got a lot of advice from me, but is now an acceptable emperor player.