I don't know how much the LAN adapters help or not - game is pretty laggy.
Not a lot of people playing, plus getting matched with some random person in your "territory" who could be 3,000+ miles away. I use a wired connection and have occasionally had some pretty lag free matches, but most of the time it goes from bad to unplayable. Overall, online is just disappointing enough (besides the lag, there's the long waits to find a match (up to five minutes), and the the way there is no skill based match-making - so that even if you manage to get a rare lag free match, odds are it's against somebody much better than you or somebody much worse).
I haven't played a ton, but I'd say out of 40 online matches, five have actually been good. Anyhow, after last night I'm pretty sure I'm just giving up.
I'm not disappointed with the game - I actually really love it & would love to be playing it more, but there are just games with MUCH better online that I'd rather put the time into getting better at, since, you know, I could actually play against other people and have a pretty good experience.