There are times in this game when i'm amazed at how well the camouflage works. I went 24 and 3 on estate, the first 20 kills going untouched sniping from a little grassy spot opposite the house. I mean i use the barrett with FMJ and Thermal, no silencer, so i'm not exactly hard to notice, but laying down in a ghillie suit in grass people will just walk right by me and i pop up and pop them with my machine pistol real quick then lay back down.
I ended up getting killed finally and then killed two more times soon after, the last time i was sniped trying to get into position and the game soon ended as we won, i'd used all 3 of my killstreaks (predator, harrier, chopper gunner) and figured ok good game. Then right after the game the guy that sniped me last msg'd me on XBL and said "No nuke for u!" hah... apparently he thought he stopped me from using a nuke, psh i don't bother with nukes.
Still, i thoroughly enjoy the games where i can go virtually unseen, i think alot of people forget the ghillie suits do work if you use them properly and find right areas to position yourself.