Since the last patch my latency with from a stable 60-100 ms (during a 2-4 hour play stretch), to 1200-1600 ms. For the life of me I could not figure a work around. In a last ditch effort to salvage whatever was left of my patience, I disconnected my belkin wireless router (even though I run a wire from the router to my PC), and ran the internet connection directly from my modem (high speed cable) to my PC...Ta daa, problem solved.
Keep in mind, that although the wireless router sevices the computers in and around the home, I DO run a hardline from the wireless router directly into my PC. But for whatever reason, even though I'm connected this way, I've been experiencing horrendous latency.
Just thought I'd throw this out there...Hope it helps.