I was playing on the experimental US first person server yesterday and my character was just sliding around a little. Like the character and the server had a hard time synchronizing. You could also notice it while running through a door and closing it behind you while you run through.

It showed me going through but after a split second it 'teleported' me in front of the closed door again.

I don't know if it's of any use but my ingame name at the time was 'Alfa'. I am playing from Europe and when connecting the server showed 180 ping in the browser.

After the restart this was a lot better and a lot less noticable.