Their silence in this regard speaks volumes. I'm afraid that they just don't want to confirm, that GR:FS is stright forward port form console and it will have matchmaking system with best ping players hosting games for everyone.
Too bad, because I really like what I see on beta vids. It's not Ghost Recon game of course (and they should remove GR from title), but it looks better than any CoD or any other arcade twitch shooter, and I would gladly play this game waiting for real GR title. I just want to have one more thing before I pre-order, confirmation on real PC support: SADS, mod support