For the last 7 days roughly I have experienced some really horrific lag in game. Initially I thought network, so I picked a couple of websites, like the www.bbc.co.uk and ran a ping -n 100 www.bbc.co.uk and everything game back fine.
Tonight I was experiencing the same kind of problems, so did the same test. Of the 100 packets I sent to www.bbc.co.uk, I was at min 14ms, max 55ms, average 21ms.
Tech details. Running on Gunnars hold, connecting from the UK, on a 60Mb/5Mb connection with Virgin Media Cable.
Intel i7 920 2.66 Ghz (Asus P6TD)
Ati Radeon 5950 (Latest drivers)
6 GB memory
GW2 on kitten .D. (Vertex 2E)
Hardwired to the router, via a Cat 5e connection (PC -> HP 1810G24 -> Draytek 2820Vn).
I am a great believer in leaving my Gaming PC well alone, so once I experienced problems, I updated the graphic drivers. No change.