yeah, the 5.9 cats are supposed to be a bit more 'streamlined' than the previous drivers. my understanding is that you should see a bit of a performance boost in almost every game you own just by upgrading the drivers. i have yet to test them as i've been busy with school, but i'll get around to the testing probably sometime this week. if you want updates, i'll let you know.
See the struggle of the faithless lot as they negate their time
How low to sink to the depths of their frame of mind