I don't know if this is a generations bug or just something that happens to quake 3 at high pings, but:
I tried out the generations server yesterday, and I had a not-too-impressive ping of ~450 
What was odd, though, is that when I tried to rocket jump -- as Slipgate -- the jump was relatively immediate, but the rocket took a few seconds to fire, resulting in a predictable accident. I tried that out again a few times, and it didn't get better.