Some games that run like shit at 2560x1600 are much better at 1080p from what I've seen.
Yes, games that are very graphically intensive can take a massive hit in 2560x1600, agreed. However, I can't stress this enough; this game is no graphical monster, visually! that is why it surprises me because nothing in this game warrants low performance. During the intro nightmare sequence everything is covered in darkness ( See Dennis' screenshot in this very thread ), you run along a dark map broken up by a few lampposts and a few brief glimpses of a lighthouse hidden away in darkness and fog. Even here, with nothing really going on the game isn't hitting any high FPS numbers. That usually tells me they are rendering completely unnecessary stuff or there's some effects that are much more taxing than what they really need to be.
Render distance. In the ferry sequence, the entire background is made up of mountains. These mounts are made up of simple polygons where some lower-resolution textures have been slapped on. That does not tax a system.
There is no correlation between what I see on screen and the massively varying FPS.
Some people in this thread just seem to defend this game with the notion that the engine is apparently out of this world. If the engine is so underwhelming visually and runs this bad, there's something wrong!
But leave it, I won't be playing the game ( yet again ), people can keep thinking the engine is the new Crysis benchmark with its 2009 feature set, DirectX 9, unimpressive lighting, horrible vegetation and low-res textures.