My attention to this was brought by my fiancee' a native Lithuanian. An article comparing the GSD lines, which she translated for me is below.
I researched a bit more, and I found the articles also mentioned herewith.
Couple that with the AKC dog shows, are we are breeding froggie GSD's with bad hips and absolutely no temperament or protection qualities?
You be the judge!
Vokie?i? aviganiai: veisl?s tipai ir naujos variacijos
JAV vokiečių aviganiai pasižymi silpnu charakteriu ir yra niekam tikę kaip tarnybiniai šunys (išskyrus retas išimtis). Siekiant išgauti „ekstremalų“ VA tipą buvo prarastos tokios savybės kaip ištvermė, geras temperamentas ir darbiniai gebėjimai (vienas kinologas kalbėdamas apie elgseną juos pavadino „šiek tiek maniakais“, kitas teigė, kad amerikiečių ir vokiečių aviganiai – visiškai skirtingos veislės, nes veisiami dėl skirtingų tikslų).
USA German Shepherd Dog has a weak character, and is useless as an official dog (except for rare exceptions). In order to get "extreme" type of VA (VA = GSD) were foregone qualities such as stamina, good temperament and working ability (one dog trainers talking about their behavior as "a little maniacs," (another) one said, that American and German Shepherd - a completely different breed, bred for the different goals).
German Shepherd German lines vs American lines German Shepherds
The American / Canadian shepherds are not required to pass any temperament test, or to do Schutzhund, to undergo the endurance test, to acquire a breed survey or any other requirement. They are not even required to be free of dysplasia. The only registry is the CKC or the AKC, which do not control the quality of the animals being bred. These animals retain a potential for protective behavior and responses, but without the courage, stability and clear headedness to temper their actions. They are often fear-biters, nervous and stressed, showing inappropriate aggressive tendencies. They lack the courage for true protection work, their aggressive behavior being a result of defensiveness and fear for themselves and not an instinct to protect their master. This can be confusing to a novice, but the end result is very different; you cannot count on this type of dog to protect and defend you in a threatening situation.
German vs North American German Shepherd
German Bloodline dogs vs. American Bloodline dogs