I haven't been on in a week or so, but since the game came out I have experienced "host ended session" continuously. I played the game for an hour on Xbox Live and actually only played a match for 5 minutes! That's disgusting.

This isn't a good start to my Xbox Live experience.

Is this going to improve?

my friends and i were having the exact same problem this weekend when we tried to get three of us in the same game. we fixed it by making sure we all fowarded the xbox live ports to our 360's ip address. i don't have to exact ports in front of me but google search should turn them up.

after we made the changes on our routers we had no problems all connecting up.

hope this helps!