I have tried OpenGL with my gtx280, and a friend's rig with ATI 5870, and to be blunt it sucks on both. Directx9 plugin on the other hand, results in flawless gameplay for 99% of games.
Unless there is a fatal error prohibiting progress in a game, wouldn't even suggest using it at all.
Unless there is a fatal error prohibiting progress in a game, wouldn't even suggest using it at all.