Hi Yoking Crib
You are not alone. I recently had a new a router hooked up in my house and ever since then I've been having the same problem you have. My internet connection is very fast and has no trouble playing other games such as a Battlefield, assassins creed and others as well. It seems that the only two games that do not work are halo reach and gears of war 3. I do not think these are regular problems that x box live support can help you with; neither your internet provider. I have spent a total of 3 hours with each with no results. I want to emphasize that others games work at optimal level theses are the only two games that do not work:S. I also have a x box arcade and have a wired connection, so it is possible that the arcade and the new update may not be compatible. It is very hard to isolate the problem because of recent updates from x box live, and my new router that I just got. I am going to attempt connecting with a new gen x box and go from there. If you are having the same problem right now feel free to write me back.