FORUMS_

wired > wireless.  Always.

Is the whole thing that if your internet is really good it punishes you... various post on the whole subject... lag comp or whatever it is. At a normal world wired is always better than wireless but for bo2 i think the less powerfull the better since it seems that the game tends to award guys with 2 bars on my experience.

Unless you have router issues, you shouldn't see much of a difference between the two.  There will be a slight increase in latency with wireless as opposed to wired.  In reality that shouldn't matter.  It should be too small to ever notice. I stick with wired because my connection is not super fast and I want as little latency as possible.  Especially in this game where there's so much lag already.  Also, there's a lot less that can go wrong with wired.  It's simple and to the point.  No possibility of interference, fluctuating signals, or wireless security querks messing things up.

Again though if everything is working as it should you will never notice a difference.  I just like to keep it simple and give my connection the best possible chance of not failing me in some way.