http://bugs.winehq.org/show_bug.cgi?id=27298
--- Comment #2 from Jonathan Strander mblackwell1024@gmail.com 2011-06-11 09:21:03 CDT --- With Wine 1.3.22 I still see the same console spam as above, but performance is definitely improved (although still not resolved). I can now use stock High settings (although I have disabled Vsync and Anti-Aliasing) and get a generally playable (although not lag-free) framerate. Previously I was using Low (which internally triggers the game to use lower resolution max textures among other things) with the effects turned up.
This isn't resolved though because the increase in fps isn't great enough to make playing at 1600x1200 possible without unplayable framerates and lag in many scenes, and even 1280x1024 is uncomfortably laggy. 1152x864 seems to be the only really playable resolution.
If someone else tests: The most demanding area I've found so far is Vergen, particularly during rain. Previously during rain the game was basically unplayable but currently with the above settings (High, 1152x864) it's still laggy but playable.
Definitely getting better.
Additionally and mostly unrelated, text at low resolutions used to be blocky and generally unreadable and is now smooth, which makes the above required low resolution more tolerable.