BT Fibre, 80meg line, I get 64down 4-8 up and a 18-32ping.
That may just be down to your latency. 18 isnt bad but i think the best i ever got down to was around 3ms on Chronicles because i lived really close to an exchange, and there were only 3 people (that i was aware of) who were marginally faster than me, Kori, Omniscent and Zyzz .
What you may find is that during pvp, also depending on what else is going on on ur net, you might be spiking slightly so although you wont feel laggy at all, the person you are fighting will feel faster. One thing to try out, is have a fight with someone in a pvp zone first to see if you feel the same/faster/slower then load up RESMON (Resource Monitor) should be a standard program in your OS > Network Tab > Processes with Network Activity - tick the mir exe which will filter the results to just that > TCP Connections and have a look at your ping while you are fighting/casting. As far as i was aware these games are largely about upload speed?
Anyway if you havent used resmon before - it looks like this