Do you have the game installed to hard drive? I haven't noticed any real lag on FFM
Yes I do. It has nothing to do with that, or my TV setup, or even my network setup. Regular matchmaking is totally lag-free for me unless there's someone with a bad connection who keeps jumping around. Single-player is totally lag-free as well. But in Firefight Matchmaking there is a slight delay between when I input something and when it happens. It's most apparent if I sidestep back and forth really quickly - it always lags behind slightly. And it lags by about the same amount at all times, throughout the match - I don't get lag spikes.
Occasionally there is no lag, presumably when I'm the host. That happens if everyone else leaves the game or if I just get lucky enough to be selected as the host.
It's not quite bad enough to make it unplayable, but I never really do Firefight matchmaking unless I really want to complete a daily challenge. It's definitely annoying and it makes me not want to play anything other than Rocketfight, where extreme precision isn't that necessary.
And I'm not the only one. Maybe you have a really good connection so you're usually selected as the host, but do some Google searching and a ton of people have the exact same problem. It is entirely the fault of the netcode in Firefight - for whatever reason, I guess Bungie decided they didn't need to give Firefight the same treatment as regular multiplayer when it comes to eliminating lag.
The next time there's a grunt challenge, do Gruntpocalypse in Score Attack. Score Attack counts as Firefight Matchmaking, and I don't think I've ever NOT seen Gruntpocalypse as an option in each round of voting.
Thanks, I'll keep that in mind!