I dunno, Unreal Engine 3 + tons of stuff going on = lag unless they prove me wrong.
This game looks pretty cool, but I'd like to see how it does on PC lagwise.
edit: Wait...this is a Windows Live game isn't it...well screw that...I'm not paying for PC multiplayer. Might be better suited as a 360 game.
LEFT4DEAD411.COM
Bet with disolitude: Left4Dead will have a higher Metacritic rating than Project Origin, 3 months after the second game's release. (hasn't been 3 months but it looks like I won :-p )