I started playing quick games with small maps and few civs (5-6) and I found out that wars are somehow more intense and closer then on slower speeds. I was really suprised, because slower speeds meant to give you more time to use your units, and more time to wage war. But when I played on epic or normal, wars usually consisted of close fights, but only for a point, when the enemy collapsed, and after this point the game was all about rolling the enemy cities with superior forces, and wiping them with low casualties. But on quick speed wars are much harder. I think it's because when you attack the enemy it can easily emphasize military technologies, the enemy can train defending units faster, while your reinforcements arrive slower(compared to the tech rate units are much slower). On epic speed if you get a slight advantage in technology or military you can really utilize it, and if you attack this slight advantage becomes bigger and bigger, and eventually wars become way too easy. But on quick you cannot crush the enemy that easily, once you have gone war, there will be constant war for centuries. Getting the edge over the enemy is way harder. By the way I play on monarch difficulty.
On slower game speeds the game is usually decided by the middle ages, or latest in the industrial era. The modern era is usually just about " pulling off" your victory. But on quick you will experience real struggling wars later too. As I experienced you have to emphasize your cities more on military, so turning off time victory is very important, because you discover techs quite lately. I mean in my games tanks weren't even invented by 2050.
The only drawback I found is that being peaceful can be quite boring, and AIs who are peaceful can get a significant tech advantage.
On slower game speeds the game is usually decided by the middle ages, or latest in the industrial era. The modern era is usually just about " pulling off" your victory. But on quick you will experience real struggling wars later too. As I experienced you have to emphasize your cities more on military, so turning off time victory is very important, because you discover techs quite lately. I mean in my games tanks weren't even invented by 2050.
The only drawback I found is that being peaceful can be quite boring, and AIs who are peaceful can get a significant tech advantage.