https://bugs.winehq.org/show_bug.cgi?id=19748
--- Comment #36 from Arthur Moore AM.WineHQ@cd-net.net --- Yes!
As of commit 4315caeff699325cd681b9beb7d22908b098411b on 3-25-2016 this is still an issue.
fixme:d3d:wined3d_occlusion_query_ops_get_data 0x8b7d388 Wrong thread, returning 1.
As has been previously noted, it prevents occlusion culling from working correctly. The performance hit comes from needing to disable occlusion culling.