Well, OpenGL was on par with D3D even before the Vertex Streaming Hack on some hardware (notably Nvidia hardware with Linux vs. Windows). JMC47 did some recent tests and found that OpenGL still outperforms D3D9 (now removed of course) on Nvidia hardware (with and without the Vertex Streaming Hack) and on AMD hardware iirc. OpenGL has generally been getting faster, even after the hack was added and the GLSL branch was merged.
Fwiw, I have an Intel HD 3000 on my desktop right here, but I don't think Slackware 13.37 has the appropriate build of Mesa for its drivers. I could test it out myself (installing Windows 7 + Slackware 14) but that's too much work to do in my spare time :p I appreciate the effort though, and I'm still curious if the speed difference is there in the HD 3000.
Fwiw, I have an Intel HD 3000 on my desktop right here, but I don't think Slackware 13.37 has the appropriate build of Mesa for its drivers. I could test it out myself (installing Windows 7 + Slackware 14) but that's too much work to do in my spare time :p I appreciate the effort though, and I'm still curious if the speed difference is there in the HD 3000.