Grid and Unreal Anthology finally arrived (thank you Royal Mail ) and are up and running.
With regards to the mic lag, you're not testing it via the in-game tests are you? The only reason I ask is that when you do on some of them, you speak into it and it then replays it back to you after a few seconds. Otherwise I agree with Madduck; a mic on it's own can't delay the tranmissions, it must be something on your computer doing it.