I remember when we had over 250 dogs at Ft. Benning, Ga. After three years you get to know the traits of all the dogs there,(especially since on weekends you worked alone and had to feed and water all of them). Anyway, as I think on it we didn't have any that had prey drive to THAT extent. We had the narc dogs and bomb dogs(aggressive method of training) who had to have strong prey drive, and of course many many other specialty dogs,(Sentry, tracker, Scout, Body recovery, Mine and Tunnel, Demo, etc), but none of these dogs were this kind of over the top in drive.
I mean if we look at it the drive itself,(prey), is used to hunt, with chasing and gripping as offshoots of the behavoir. It is also beneficial in herding in keeping sheep in flock(chasin) and sometimes having to exert influence(gripping). Still, this drive was always under the control of the commands of the Shepherd and the dog's discernment/disgression.
This breed is the ultimate example of the dog working with man in sync to perform complex operations, thus becoming the versatile utility dog extraordinaire. I do not think these dogs exhibit this kind of working with man temperament, unless it is hammered into the dog with things like prong collars or electric; and they also require "almost" a master trainer to get them to certain points.
To me this isn't "Shepherd" temperament.