AI Delayed... rofl?

[Spartiate]

That's odd.My comp has only a 6200 nVidia card but has excellent cooling and 4 gig of DDR ram and i can play pretty big battles.In one battle [as the Turks]i had 3 full stack Mongol armies start on the battlefield with my reinforcements arriving in the next minute or so. I'm starting to wonder is M2TW all about Ram and processing power and not so much about the graphics card?
I have found, however, that when playing as a European power that the comp can lag a bit in large battles involving more than two armies.This, i suspect, has to do with all the vegetation and scenery the comp has to render as opposed to the relatively bland scenery in desert areas.