It's hard for me to figure out why anyone would think that's a GOOD thing. I've seen it talked about and described on here many times; that Civ IV on the harder difficulty levels was essentially just finding ways around how the computer cheated considering how many advantages they were given.
I'm sorry but that, to me, is not fun. It was almost people would come on here and say things like "Ok, if you want to beat Deity, here's EXACTLY what you must do and if you do anything else, you'll lose." Uhhhhhhhhhh, ok? So basically I have to play a game which is supposed to be about finding different ways to win one way or I have no chance? How is that fun? I'd see a lot of posts on here of people saying the EXACT Civ's you needed to be if you wanted to have a chance of winning on the higher difficulty levels. I don't find that to be "fun." If I had to choose between a game being slightly easier and/or "dumbed down" as people seem to enjoy calling it around here, or playing a game that's damn near impossible to win unless you cheat as much as the CPU is, then I choose the former. Every time.