Most people are not experiencing lag but I am, all my other games run fine and so did WOW so it is another issue (I have V Sync turned off). In game enemies and players appear and disapear, I get attacked by enemies I cant see and attacking enemies does not reduce their health bar until 10/15 secs into the fight, that is if they don't disapear first, moving around the city is still smooth. I looked around on DC forums and a few people said you can improve it by editing Nvidia settings from 'Turbo'  to a lower performance setting but not much explanation on how to do that, if anyone here has any tips on reducing this lag please tell me as I have barely been able to play this game since it's release. Im not very computer savy so if you could explain what to do as detailed as possible that would be great. 

*Edit, Im playing on PC, EU Server, Wired Connection. Also found out that it's not actual lag im having but a visual delay

Are you playing on the PS3, or PC? Which server are you using, and is it in the US, UK, or EU.  Are you using a  Wi-Fi conection or wired?  
 
I probably can't help but anyone who can will need that info.