"exaggerated hip angle" is not part of the AKC standard. There are some dogs with poorly conformed hips but it's not the norm, it's pretty much confined to those dogs that are used for specialty dog shows.
"Amateurs who use their dogs for volunteer search and rescue work may try to use these dogs, but professionals and law enforcement do not."
Every SAR team I have met has been amateur. I didn't know anyone could make a living out of it. Law enforcment does not do SAR in general since they work with dogs who have been trained to defend and attack. The fact that military and police use mostly imported dogs has nothing to do with the AKC standard and everything to do with supply and demand. Europeans breed dogs like we breed crops and are able to supply dog brokers.
There are a LOT of search and rescue dogs which are handled by professional law enforcement, military, and emergency services personnel. Shortly after the WTC attack, the New York Times did a story on the search dogs working at the site, which were primarily professionally handled (perhaps exclusively, as real amateurs weren't being allowed access to the site). The article, which was getting its information from the professionals in question, explained why the American/AKC dogs were not used.
There's plenty of information on the Internet about the different German Shepherd breeds if you're interested. Professionals are NOT importing dogs due to "supply and demand". There is no sortage of Germna Shepherd puppies in the U.S. -- they're just the wrong kind. The German breed organizations recognize two separate lines of dogs -- show and working - and the show dogs are similar to the AKC dogs.
This page gives an extremely detailed description of the anatomical differences between the two general types of German Shepherds, and their effects (and my understanding is that the same issues surround the Belgian Malinois breed).
http://workingdogs.com/portal/html/article.php?sid=57