Why is OpenGL around 30% slower now compared to 4.0-399?

[drhycodan]

It's possible the games you tested were really light games and didn't need the VSH to run full speed in the first place. Try running the opening of Metroid Prime to the point where you first see Samus' ship with OpenGL. It now slows down to 60% during that cutscene where I was getting 100% before with the VSH enabled.