You're wrong. People warping around when in close proximity is definately related to your FPS and is also a known issue since way back in the beta. Now, for a high-end system this is naturally not a problem, but for a low/mid-end system it just ruins everything. This all boils down to warzones being absolutely horrible on your fps due to a bad graphics engine.
I have this very same problem, and my specs are also very bad. However, World pvp give me no problems with fps, warping players or skill delay, all which are common to a lot of people fighting in warzones.
Oh yeah, I played on US east in beta, and now I play on EU. Ping differs by 70, no packet loss and no jitter on either. The problem persists. Not a connectivity issue, I'm 100% sure of that.