I just wanted to see if anyone else notice this, but yesterday I was playing MM for a while yesterday and in almost every game I played, it lagged. I know it has nothing to do with my connection because I have never had problems with it lagging like that before. It was lagging like Halo 3 would. Then I got onto Halo 3 later, and there was no lag at all.
Reach has horrible host selection, as well as common occurrences to match you up with people from other countries.
I’d call it a one off 
I read this thread and just thought to myself “Six days”.