After sum players tested the game at Quakecon, i wonder if old Q&A are telling truth -
http://brink.chefenco.com/gigantic-brink-qa-with-richard-ham/
Q: Will the main gunplay be like ET (hitscan tracking weapons) or will there be more of a mix of guntypes, like point and click shotguns or rifles?
A: As for the guns, there’s a mix of gun types, but i’ll admit my ignorance and say i’m not sure what you mean by hitscan. do you mean moddeling the actual existence of bullets? we’re not doing that. there’s a wide variety of guns though, more than in either ET game.
Q: Hitscan means if you aim at the target it hits immediatly. Rocketslaunchers, riflenades, nades are the opposite of hitscan, as they have an inbuilt ‘delay’ while the projectile travels along its path.
A: Ahha! so I guessed correctly! Yup, the majority of the weapons fire that way (instant impact). there are a couple of grenade launchers though (one is shown as part of the demo we’ve been showing).
Q: Can we expect similiar gameplay to ET and RTCW. Fast objective gameplay. Requires more tactics instead of aim.
A: Yes, but i’ll have to say it now, Brink will not be as fast as W:ET (see my earlier comment about trying to make a game with as broad an appeal as possible). But faster than the norm, I’d say. And very deep 
Q: Will there be ET/RTCW spawntimers & selfkilling?
A: All the normal rules and tactics you’ve come to expect from ET will be in Brink