As myself and plenty others have noticed there is a large amount of lag and delay in battlegrounds. Open world PvP is fine, but in battlegrounds it's terrible. Every battleground I am in there are multiple complaints about delay and most of my friends and acquaintances have stopped PvPing all together due to these problems.
Outside of battlegrounds everything else is decent and playable from questing to PvE to open world PvP. This is a major problem and I hope this problem will be addressed sooner than later. Every post I read about Nostalruis on other forums or websites there is always mention of the terrible lag/delay in PvP so I know it affects a lot of people. I was very hopeful the lag would go away when the PvE server was released but it has not changed at all.