It isn't just wine, even Valve's port of the Source engine to Linux is optimized towards NVIDIA proprietary blobs. Just recently we got to the bottom of a serious at the Steam for Linux github with Valve on the horrid performance and input lag of, especially, their multiplayer titles like TF2. The culprit is they are relying on a feature not in OpenGL specifications that NVIDIA drivers perform. NVIDIA has the desktop market cornered with around 70% of graphics cards being NVIDIA, so most games are being optimized towards NVIDIA binary blobs.
No announcement yet.
AMD Catalyst vs. NVIDIA OpenCL Performance