I do not think that is what that means. Mine also says "2D Driver Version" (8.70.something), and runs 3D decently.
So I think you are mistaken. That's not telling you "given a choice between a 2D driver and a 3D driver, you picked the 2D driver". It's telling you "the version of the part of the driver which handles 2D calls is 8.69.4."
This doesn't help with the speed issues, but it does tell you where NOT to look, which may narrow things down.