I had abysmal performance with the Steam version on Win64 bit running an i7 CPU and an R9 270X. I had something like 5-10 FPS, stuttering (including during videos), desynced audio, the works. I managed to fix the problem by right-clicking the game's executable (WolfNewOrder_x64.exe), going to properties, compability, then forcing the game to run as administrator. This completely resolved my performance issues. Normally games ask for admin access so I thought it was strange that Wolf didn't, but the fix isn't really all that obvious. If anyone else can verify that this fix works for them, I guess you can add it to the wiki.
Apologies if I'm not doing the right thing here on the Talk page, I don't really know my way around this side of wikis.