I wish I could encounter this super aggressive AI that people keep talking about, it would make things more interesting!
I tried playing a huge map (I usually play with giant or gigantic) on snail, and...holy tech speed batman! Techs come very quickly, every 2, 3 or 4 turns. I have a fairly average start, nothing that provides a big science bounus, except for the river. I find this a little strange on snail.
Wait a little bit, the techs for very early prehistoric are a bit unbalanced in terms of costs. Things start to get reasonable for Snail at about Tool Making or so.


), and spends most of its time now building gold/research (i.e. the pattern is research new tech, build the associated building(s), and then build gold/research until the next tech comes in). I can see that my next oldest cities will soon be completely built up as well. Overall, it seems I'm able to build pretty much every building in almost every city, which reduces the strategic value of picking which buildings to prioritize.
