http://bugs.winehq.org/show_bug.cgi?id=19889
--- Comment #13 from Alexey Loukianov mooroon2@mail.ru 2010-10-01 04:53:40 CDT --- I had checked and can state that this bug is _partially_ fixed. Now the games and download progress views seems to be almost non-laggy, while game store and all other internet-browsing-related views are still laggy as a hell.
Wine 1.3.3 compiled from source, Fedora 8 32bit, AMD Phenom II 955 (4 core @3.2Ghz), 6Gb DDR2 RAM, GeForce GTS250 1Gb VRAM - i.e. the hardware is decent enough to run such a simple program as Steam without lags.