Photolysis
Banned
How do you know if you're hosting?
Keep a sharp eye on how quickly grenades and rockets appear. I also check most games by analysing my network traffic (I connect my 360 through a computer to my wireless network).
The host selection process really does stagger me. It really is almost impossible to have a better connection to host games with, yet it insists on giving 16 player BTB games to someone with a connection like dial-up!
Not kidding; a game just now took 41 seconds for the timer to update, and was so laggy that the lag/latency bars didn't pop up for 60 seconds-ish. I've never had any game in Halo where it was this bad.