I have a few times walk through walls and tables on the ps3 version, or get 30 second delay on fights or nothing showing up, but running around in no animation, were I have to now have people in a voice chat that got to tell me to move. This my connection on a comcast connection. This Give you guys a idea of the speeds I am running.
http://www.speedtest.net/my-result/2983868685 under 50 miles
http://www.speedtest.net/my-result/2983873647 coast to coast
http://www.speedtest.net/my-result/2983877674 west coast to japan.

It worst for fiber players on ps3.