Why do people lag on my server? I use highspeed internet running at 100mbps and i just got a brand new computer.
Halo is a laggy game by nature. It was originally designed and coded for the Xbox, before they had Xbox Live. As such, the multiplayer was not optimized for anything other than local network play, where lag is negligible. Over the internet, however, the lack of interpolation and lag compensation are made very obvious, since the game was never originally intended to be played over the Internet.
tl;dr - it's not you or your connection, it's the game itself.