Bungie's own Matt Soell has posted a Halo National Tournament report from El Bastard in Florida:
Everyone knows people who have played Halo through on Normal, but seem to always get their asses handed to them during LAN play. Usually, this person feels that their tactics are superior and it was the game that failed in the execution. Such a player might, say, jump into a warthog, drive close to a heated battle, then hop in the back and try and use the LAAG to wipe out his foes. In theory, such a guy should get a few kills, right? Well, theory or not, this interesting tactic resulted in a grand total of 3 kills. You'd think wandering around shooting rockets randomly into each base might have improved his chances by a factor of 5 at least.
Be sure to check it out, some interesting stuff in there.