Hi Stephane,
I was not saying that the JV-2080 suffers from the same problem as the keyboards. I was really saying that it suffers from midi timing problems. These are real and I don't necessarily know what causes them. My assumption is that the processor for the 2080 is just overloaded with trying to support the 64 notes of polyphony, 3 insert fx, 2 master fx, plus the synth engine that it can't keep up and we get the midi slop in the meantime.
Simply playing it you won't really notice it. However, when you are using it in a sequence that requires some tight timing, you definitely notice it.
Fernando