Wasn't this known a LONG time back? I can distinctly remember on the Stalker forums (and On GG for that matter) people complaining about this.
I guess they had more important issues in this game, like iron sights and which side of the gun bullets were ejecting out. (Seriously, some of the geeks on the Stalker forum need to get a life.)
I think it was mentioned, but this is the first time I've seen it said without any room for doubt. I haven't been watching it too close though, so this might be old news.