I have no advice, just moral support. I watched Sabi teach dozens of pups and young dogs, I trusted her judgement, but I can see it freaking people out.
I can tell you that several of my more experienced friends had commented that specific to GSD's the females show a notably higher tendency to dog aggression then other breeds. In most breeds the males seem more prone. I have to say that my experience lends support to this, but since I am not that smart take it for what it's worth.