lag has been a big issue to allot of people and i even discussed it with my IP (since it jumps for me from 320ms to 1.3k in the matter of seconds) and they back traced it to how many gateways the server has to go thru just to reach me they also said it seemed as if the server i was trying to reach wasn't pushing enough output speed).. well atleast that is what they said. since i have full connection speeds at all times on my side(only have 1 pc and and no wifi) it has to be a issue on your side.
I had my ISP tweak the routing it goes through before it reaches the server and back, still my lag spikes. I am on a 6MBPS connection, as well, and I see other people on WC with the same problem, not just those living in the Philippines.
I am also on a direct connection, meaning no router - also meaning no router to blame, nor other users who might consume the bandwidth.
Modem's all new, had it replaced just a week ago.
But Aga said it's not the patch (the one before this) nor the server, so nothing can be done.