As a piece of general information: Hosting a game will always put you at an advantage because you are the one who receives information from other players and then forwards it to the rest of them. You are the be-all and the end-all here.
In CoD, this allows you to get around a corner and shoot someone before you've sent this action to the player on the other end, which will make see what happened in the kill cam. After it happened.
Say if I'm host and I come around the corner and have a 1-2 second jump on you, you still have a chance to retaliate.
Just sayin', 1-2 seconds is probably enough to kill someone in BRINK. 1-2 seconds in FPS-time is
A LOT.
If you had a 0.2-0.6 seconds advantage, that wouldn't make too much of a difference.