Yeah even when you do put it on the lowest settings like I've tried with my laptop(which isn't that great 1.7GHzDual, 3GBRam, atix1200graphics<----weak), it doesn't really run too well at all.  On my desktop which is retty decent 2.66Dual, 2GB ram, 9800GT, it runs pretty much fine. Sometimes when playing mod games where there a re a ton of units on the screen it might slow down a little but it runs fine honestly.