So Rome in my recent Emperor game was able to settle his first city while I was still building the pyramids. That's a bit much to me.
Depends a bit on what policy he took but a settler is cheaper than Pyramids so is that strange?
If you play without mods emperor AI starts with a worker so 4 pop isnt an issue if there are farm tiles available and if he went tradition no workers are needed.
I dont have the numbers in my head but ... I think monument shrine settler was cheaper in hammers than monument pyramids or atleast same-ish.
On an opposite weird note I had tradition Korea getting really hosed and robbed on pretty much every wonder (ethiopia and brazil wanted them all) he was last in tech most of the game.