Actually, could it be a hybrid graphics issue? I recall Steam games having problems with those...
Anyway I'm playing the game on an Asus 1015PN running on an Atom 550, with Nvidia ION. On the ION side of things, Optimus is using the graphics card to run FS. Well at least the tray icon that comes with the driver says I am doing that...
I do get random 5 second "pauses" sometimes, when going through doors, or jumping onto crates. Not often enough to annoy me, tho, and so far I haven't got one during battle yet...
(I also have a desktop running an old AM2 3600+ and an 9500GT, but that doesn't matter - it should work flawlessly on *that* on MAX settings, and it does. Funny because on the laptop I get to choose to disable VRAM, but in the desktop *I do not, the VRAM options are greyed out*).
I should attempt to disable Optimus for FS and see what happens, but I can't do it now...