So, I have a 6D and a D600 in hand right now...

Can't you just feel the Nikon trolls just steaming by now?? lol.  You know they want to dive in head first, but they can't until the shots that need massive shadow pulling hdr look come in to play, lol  Just get it over with op, give them something to cheer about.  Take a pic way under exposed and then pull the shadows up a few stops to a poor hdr look and give these guys something to hang their hats on, will ya?