P4 2.4 Ghz
Radeon 9800 pro
1 gig DDR RAM
512k broadband connection

I get lag when arrows start flying; I played a 2v2 with medium sized armies not long ago and as soon as the player who has chosen Scythia started using his horse archers I started lagging. The same thing happened in other games I have played against archer heavy factions. In that missile test Louis mentioned things steadily declined with each volley of arrows until I was getting 1 FPS, if that. I couldn't even tell what was happening in the second half of the tests.

Right now if you want to kill a frog online just pick Scythia. I can't counter cav archers and the arrows lag me, getting slightly worse with each volley.