User blog comment:Callofduty4/Modern Warfare 3 Launch Trailer/@comment-80.98.246.24-20111023115005/@comment-80.98.246.24-20111023132507

But with matchmaking you can't decide to which lobby you will connect, and you can be level hacked against your will, and there is no way to kick cheaters. With dedis, you can actually decide to join an xp boost server, or not. And you can surely find some decent dedi servers, if you search for them, then you can add them to favourites, and there you go. So still, ranked dedis are the only way for PC.