I'm not sure why you think zlib performance has anything to do with 3d performance...

As for wine graphics performance, games like Diablo 2, Counterstrike, World of Goo, Plants vs Zombies are almost unplayable on my Atom/945 netbook and noticeably slower on my Core2/Quadro laptop compared to running them on Windows directly. Maybe your system is powerful enough that you don't notice the slowdown or even get a speed increase through wine but that's far from universal.

Finally, it's obvious that brigdman is employed by AMD to ban dissenters from Phoronix (and other forums). Tread carefully, AMD is evil like that.