Nice. Please report back if you play a large section where you can pick off a group without ever giving up your position. The demo seemed like a crapshoot. You were always seen in the first part, but down the road you could take out 5 guys without ever giving away your position. Obviously the latter is desirable.
Well in the second mission
you must infiltrate a factory and there are some "loud noises" that you can utilise to time your shot and naviguate the environement without being heard.
Here'S a pic just to give you an idea of the second mission.
http://www.abload.de/img/sniperelitev22012-05-5rlc3.png