As it happens I used to play the organ and yes latency can be a real issue, especially in orchestras. Orchestras are notoriously behind conductors to the point

As it happens I used to play the organ and yes latency can be a real issue, especially in orchestras. Orchestras are notoriously behind conductors to the point that conductors conduct ahead of the time they want the beat to be. Drummers in orchestras need to guess (and have the experience) at which point after the conductor's beat they hit in order to be in sync with most of the other musicians. That's a tough spot to be in latency-wise :) Apart from that organ music tends not to have a strong focus on rhythm and groove, in which case latency is less of an issue.