Are German Shepherds typically really mellow as puppies?

They are good dogs, but like any large breed they need to be ran DAILY. Your huskies are probably so hyper because they do not get out enough. I have owned large breed dogs my whole life and the only time I seen large dogs act hyper was due to lack of exercise. Make it a point to take her to obedience cles asap. Take her for walks at least once a day. Make sure your dog get a good run a couple times a week. I used to get on my bike and have my rotts run alongside me on a track for a couple of miles.