I've noticed mouse input lag when certain things like caps colliding or torps connecting happen in big battles, and I thought it was just hardware lag on my end. Finding this thread has caused me to wonder. It happens about 50% of the time when someone gets hit by nightmares in big fleet battles, and I thought I saw a tiny bit when I was using cannonballs in a snub fight, but I wasn't recording and don't have any footage to check. I play with music off so I have no idea if music lags.