Do the scripted cut scenes seem to chug for other people? The gameplay itself is fine.
i5 @ 4.5 + ssd + 680 @ 1920x1200
Btw I fixed this by lowering post processing. In fact I plugged in my 560Ti2GB and lowered a few more options, and don't really notice anything while playing, except for a slightly shorter render distance on a few objects. Eh whatever, fun game is fun.