Rich, not arguing with your analysis of the dog's origin here...
I have no clue what line he's from
Just thought I'd show you a photo of my female American show line shepherd:
http://www.gentlesoulsshepherds.com/mokaforest.jpg
Don't know how well the back thing applies...
I'd also disagree that all American show line shepherds are stupid and spooky. I'm the first one to agree that Moka (my female shown in that photo) would be useless as a working dog in any kind of bitework, but she's one of the smartest dogs I've ever known (practically trained herself) and her nerves are rock-solid.
She's a very sweet and affectionate little female (59 pounds, now 11 years old); loves children and small animals, very protective of them. She's also completely bomb-proof - we've had some drunken teenager boys around our neighbourhood "gang up" on her during our walks, trying to scare her at Halloween with their crazy costumes (big masks, capes etc).
When they pester me too much she gets defensive, but never so much as takes a step back when threatened, just calmly standing her ground and keeping herself between me and the threat. Not showing any avoidance when threatened at night by a bunch of teenagers yelling, throwing things at her with big scary costumes on... not bad for a backyard-bred dysplastic little female.
Another incident we had involved 3 large stray dogs going after our pet rabbits. This was last summer; we had the rabbits out in exercise pens in our front yard and Moka was loose in the yard too. Our front yard is not fenced in, and 3 large stray dogs came charging over, jumping at the pens and trying to get at the rabbits.
The largest of the dogs is a huge mix (over 180 lbs, a very dominant male that lives down the street), and they were all aggressively circling and barking at the rabbits.
My then 10-year-old little American show line female with arthritic hips charged at the dogs and would not back down.
I ran out and tried to chase the dogs away, but the dominant male charged at me and body-checked me (don't know what it's called). He knocked me to the ground and I decided to go back to the house and grab a shovel to chase them away more safely so I wouldn't get bitten.
Now Moka could easily have bolted and run back to the house (or to the backyard) since she was loose, but she stood her ground! The dogs circled around her and the rabbits, but she never let them get between her and the rabbits and she stared them down.
It worked. They saw her determination and actually backed down. Once I came back with the shovel and screamed at them, I managed to chase them off down the street and went to go get their owner. Moka never left the rabbits, even when she was on her own.
...
I'm not saying that I like the American show lines because I don't. I think that the shepherds you see in the show ring are hideously deformed creatures (the German show lines are no better with their horrible roach backs!!). I would certainly not go out and buy another show line shepherd knowing what I know now, but I still don't think it's fair to be that derogatory to all show line American shepherds.
They don't all suck. Sure they're useless as police dogs or as protection dogs, but many of them have very nice temperaments to be pets. They bark at intruders, some are braver than others and for the most part, they're effective deterrents.
Just felt the need to step in here and defend my Moka. She's a fantastic dog, has been the best companion and protector we could hope for for the past 11 years and I'll miss her so much once she's gone. I got her when I was 11 years old and we pretty much grew up together.
I'm hoping that she'll still live for many more years though, because she's irreplaceable and priceless to our family (showline or not).