Seems your question hasn't been entirely answered yet.
Fast Cavalry can, as stated in the main rulebook, march and shoot in the same turn. They can also shoot in the same turn as they rally, which tends to prove useful.
With Wood Elves, only the infantry (with one exception that escapes me at the moment... perhaps Waywatchers?) get to move and shoot without penalty. If it helps, think of it like this. Wood Elves may be really bloody good shots, but when you're riding bareback on a galloping horse and trying to aim a bow at a moving target which may or may not be aiming a bow back at you, you're at least going to be taking a -1 penalty to hit in game terms. There's inhuman accuracy and then there's inhuman accuracy.
