For anyone that's wondering why Halo 4 MP is in a state of array (just watch the kill cams if you want to see how bad things are getting) this thread clears it up pretty good (just watch the kill cams if you want to see how bad things are getting). I guess people with good connections get punished and people with bad connections have it good (for the most part at least). And cheating is becoming pretty horrible as well it seems. Hopefully they can get this resolved soon! I want to play some Team Snipers!
Edit: This post sums it up PERFECTLY and it's exactly what's happening to me.
Halo 3 did have lag compensation but it was never this bad. Let's put it this way. Most modern games have lag compensation and it will never change, it cannot. It is not fair to people who may not be financially capable of purchasing better internet and it helps when people from other countries play with each other.
Now, what you are experiencing could quite possibly be lag. I do not know your skill level, nor do I want to "guess" what skill level you are but for the purposes of this discussion and suggestion I will give some light to it, using myself as an example.
For an example, I right now, have roughly a 2.0 KD (I think it is like 1.98) and I am a SR 42. I run into issues sporadically with the gameplay, namely when I play objective game types where a lot of things are going on. I notice, that sometimes when I am in games I am completely dominating people at a similar SR rank (I know SR rank does not = skill but w.e.) I then play games where it seems a little jittery and I am being out DMR'd by lower SR rank people. This is fine because some people have bad games, w.e. However, a trend arose from these types of games where I do statistically bad. The kill cam in these games are horrid. I watch myself get shot through walls, the guy/gal might be looking down on the ground and I just magically die, or it shows the person aiming up in the air and I just fall down on the ground.
This ladies and gentlemen, is lag compensation kicking in. Most games, I have no problem with the kill cam (the games I do well in) and the games I do horrid in show a 1 to 2 second delay of DMR shooting or firing (this could be br, ar, etc.)
I cannot express it enough that I am not whining or am displeased with the game. I love H4 but this is definitely game breaking. 1 to 2 seconds of lag compensation on someone with a good connection, means that someone with a bad connection is 1 or 2 seconds ahead of me, regardless of how I play I will die against any competent player.