Yes, sneaking up behind an enemy soldier, knife in hand, ramming it into their chest as they turn around and look at you dramatically, before staring vacantly into the sky while you navigate their thoracic cavity before withdrawling the blade, the victim's dogtags being pulled away at the same time...is very authentic.
Every day that goes by, ARMA 3 just looks better and better. Keep it up Infinity Ward 2.0, keep it up EA Dice. I'm looking forward to enjoying a real authentic military simulation game, and the more you two make movie-based action fests, the more I'm going to enjoy it when it comes out. Already enjoying the hell out of ARMA II and ACE, so whatever.