It really wasn't anything negative just a jib, they are just so high energy. they hunt and take training very well....
I believe what we've done to many breeds IS a very negative/sad thing. The 'high energy' you refer to, I like to refer to as 'flighty'. IMO, this 'high energy' or 'flighty' does make it harder to train them compared to the more subdued acting European breed counterparts. Seems being more calm, the more pure bloodline dogs stay focused better.
Not saying it's impossible to get a good dog here, just that you have to be more careful about choosing a bloodline. Course, getting a good shepherd here is getting harder and harder. It's laughable what we here in the U.S. consider a good sized shepherd compared to W. Germany and Czech.
Same with Rotts. and Dobes.