Oh, that. You're right about "maybe others", it goes back to the first Call of Duty campaign (and probably their first game, Allied Assault) and all I'm going to say is that the opening of the Soviet campaign got the point across to me much more than Enemy At the Gates or any other movie about that event could do. Of course, we all know this is something that goes back to the first Half-Life.
I honestly don't see any correlation, though. I know what their style is. It has no bearing on what's going on here. I'm really not sure what there could be more to it to make it seem any different than it already seems.
All I'm going to say is I am going to give them the benefit of the doubt, I probably will play it and render a final verdict then. Not sure if I'll stick around to join Rocket Edge's proposed clan, though.