Have to call bullshit from first hand experience mate, ranked objective playlist at 50 for years was a haven to host cheating and booting. Also remember in the lobby how your yellow boxes would disappear and then magically all fill up and the game would start or the search would take a long time?...yep bridging host at its finest before the game even started. How about so many quitters? A large percentage of quitters was in fact host booting at work. Don't kid yourself at high levels in almost any playlist it was rampant, not so much at launch but the longer Halo 3 was out the worse it got. Also you couldn't bridge host yourself in 3 but could in 2. How about bought accounts? How about boosted accounts? How about DDOS? I could keep going.
How many players bridged host to stop the cheaters? Therefore cheating themselves and cheating players/teams like me out of any chance to get Aussie host.