So how will PvP work?

[HealBus]

Will it be melee running on the skirts of a kiter getting spammed "you are not in range" or will it be casters and interrupters whipping out the rosary beads and lucky dice when it come to cast bar juking?

EDIT: If it wasn't obvious then this post is about the server delay and how it will work in a non scripted environment.