I haven't experience any lag and the game is running fine for me. Maybe it's because I upgraded my computer before the event.
But I still get the regular err=7 (or new an improved code=007) once a day.
I've not had any err=7's for about 3 months, then 5 crop up yesterday which was pretty annoying for me and I guess the groups I was in trying to do THK
I live on the east coast U.S. I checked my active connections while running Guild Wars and noticed I have 1 connection to Texas, 2 to Germany and 1 to Japan The lag isnt bad when I go into PvE tombs but just about anywhere else it has been terrible.