You heard it here first folks...Splash Damage, go ahead and scrap your patches fixing the lag. We all just need better connections.
It's amazing how people still play the "Get a gooder connexshunz" Card these days.
A lag fest is nothing-but-lag.
About 3 out of 4 good games is not considered a lag fest. Yes, it is an issue, but it by no means destroys every match. My hunch is that it's the AI that is generating the lag, which would explain why Old School isn't affected as much.