I had heard of this before but never experienced it...
Had my first chinese scout luck into goodie huts that gave unit promotions and ended up with a chinese rifleman in about 500 BC. This unit (with a backup archer and general) cleared my whole small continent (2 other civs, 7 city-states) and basically allowed me to sprawl a lovely empire that built a spaceship and took off while the remaining civs were still working on the concept of indoor plumbing or something.
It was kind of amusing, but it removed all challenge from the game.
Had my first chinese scout luck into goodie huts that gave unit promotions and ended up with a chinese rifleman in about 500 BC. This unit (with a backup archer and general) cleared my whole small continent (2 other civs, 7 city-states) and basically allowed me to sprawl a lovely empire that built a spaceship and took off while the remaining civs were still working on the concept of indoor plumbing or something.
It was kind of amusing, but it removed all challenge from the game.