In the drop in game I played today, it was pretty much impossible to do anything when the puck was on my stick because I had about a half-second delay between when I pressed a button and when it registered on screen. The PS4 Beta was like this, too, but only in about 6 or 7 of the 50ish games I played.
I've heard people speculating that drop in games aren't region restricted right now? Some Americans and Canadians are getting matched up with people in Europe, apparently? The online play in this series has always been setup so that everyone's online performance is only as good as the weakest connection in the group session, which is done to prevent synching issues.