[SDL] Input latency in OpenGL?

[Iori Branford]

I'm on a Windows box with an ATI Radeon X1950 and the latest drivers. In my
programs, keyboard and joystick events seem to take longer to be processed in
OpenGL than in software or DirectX. If other OpenGL/SDL programs are lagging,
I'm not seeing it.

Even if it is just me, even if this delay won't be noticed in real gameplay, I'm
interested in whatever I can do to improve input response time. I use Bob
Pendleton's Fast Events but it doesn't appear to make a difference.