We have a young solid black female from Czech-born parents. Interestingly enough, she came from Kleinen Hain, which posted above.
We also have an 8 month old male pup, with some DDR lines represented. Lord Vom Gleisdreieck appears several generations back (5-6?); more recently, **** Vom Weltwitz; Sven Grafental. A pretty fair number of Sch III dogs in his lineage.
Two dogs is not really a broad sample, but here's my impressions, for what they are worth. The Czech line girl seems to take to Schutzhund, at least through a very early but steady, once to twice weekly training sessions. She was slow to do stimulative barking in rag work. But numerous females at the training site have seemed slower to bark than the males. She was always eager for the bite, with a deep, even bite and the decoys and the head of the club say she hits very hard. More civil? That's kind of an open book until it is really tested, and you hope it does not get tested. Sleeve work in the open seems to stimulate more prey drive. When trainers have put her in the "box" apparatus, she usually shows a deeper bark. At home, the female is much more apt to light up if she senses something going on in the street. She is a very athletic girl. I have only recently started her jumping. And she goes over the A-frame wall nicely and willingly. Until her first heat, she kind of had an "I'll ask forgiveness rather than permission" streak. Not unbiddable, but she did have her own ideas about things at times. Since her first heat, she is more biddable in obedience work, and at 15 months, she has a nice off-switch and good house manners. She is a very sweet tempered and demonstratively affectionate girl with family.
The male with the DDR line (not pure DDR, which is by most accounts rare or just about non-existent depending on who you ask): He was introduced to Schutzhund earlier, and barked like crazy in ragwork, and bit deeply, evenly and firmly from the start. That said, other than his readiness to bark, and his larger size, I don't see a lot of difference between him and the female as to willingness to go after a rag or now, a sleeve. Civil? I think he is too young to say, and from what I've read and seen, a truly civil dog is fairly rare. When he bites something, even at 5-6 months, he has to out it voluntarily, otherwise, you aren't getting it away from him. But is he doing it more out of prey/play drive, than protection? I expect so. At home, he is a very sweet tempered boy, playful, to the point of making me his play-slave. My wife works him at Schutzhund. At just under nine months, he is almost as big as she is. I worry sometimes that he will get too big to do some of the jump work. But left to his own devices, he can and does jump impressively.
I've had two-three dogs in maybe 47 years who I would bet pretty heavily that they would bite a person if it came to it. One was a mixed breed dog I had a s a kid, another was a 135 pound Newfoundland bitch, the other was a female working line shepherd with whom we did not do Schutzhund.
but here is Masi that I got from kleinenhain above
