Off hand, I think it has to do with how many people are online in the lobby (size of offload to my computer). If I remember right, its not as bad in the wee hours when less than 150 people are on (sma ...
I'd subscribe to Jiri's explanation and right it off, if it wasn't for everyone I fly with treating me like I had the plague when I described this problem. If what Jiri said was the complete problem, ...