On singleplayer mode I never experienced any kind of lag.
On splitscreen I had an occasional very minor lag here and there until the final levels. In the last two zones of the story when I was fighting, the game would freeze up every 5-10 seconds and last any where from 3-7 seconds. It was just awful but I was able to finish it up. They seriously need to apply a patch to fix it and do a much better job on the next one.
I haven't played it online at all though.








