There does appear to be some form of lag and for me it's positional as well. And i mean your position vs the targets position. I've had this happen quite a few times where i stand right in front of a target, facing the target and try to use any offensive ability. All i get is a message saying you can't use this ability, target out of range or whatever. Some of these targets i follow when they move and after i while i can use my offensive abilities. At other times i just give up and move on to another target. Also running after a target during a fate for example can at times be difficult to use an offensive ability as well. Or the ability is used but it has no effect. The last i always just assumed i missed. But now i've my doubts.

I've not seen any rubberbanding. Although i have seen a few people running erratically in which i'm pretty sure their connection was their problem. I have a 50mb/s connection and it's performance right now is stellar in games, etc.