Here is a preview from gamespot.
http://uk.gamespot.com/pc/strategy/e...&mode=previews
This is something that got my attention
"Incidentally, cannon balls (and just about everything else in the game) will be affected by weather conditions, so you'll have to keep that in mind. For example, when the ground is hard cannon balls will bounce and roll, and our cavalry will be able to zip around the battlefield at a good speed. If it rains, though, the ground will get muddy and cannon balls will sink into it as the cavalry rides by at a more sedate pace. Rain can also cause your gunpowder to get wet, and if it gets too cold there's even a danger that weapons can freeze".
