So far as my observation has been able to go, the lag patterns go as such:
A lagstorm lasts between ten minutes at best and a few hours at most.
Lagstorms come in clusters with a few hours or more between.
These clusters can have as much as a week of solid, lag free play.
The lag itself hits intermittantly; one second it's normal, the next it completely freezes.
At worst, the game is completely unplayable and connection impossible.
At best, it jerks you around a bit. These two patterns seem to fade in and out.
As of now the lag has subsided.
Poll