I concur. The responsibility lies solely with the owner. I couldn't get my dog to attack anyone for the life of me, it's just not in some dogs. In fact, I'm fairly sure that if I had an intruder do harm to me, from my lab I would get a few stern barks, and then she would try to make friends.
I think every dog is capable of biting if not raised properly. I have never had a dog owned by me bite or hurt anyone, other then myself. Any aggression must be dealt with as a puppy. My golden retriever bit me once seven years ago when I tried to take food away from her, as I was in the middle of training (taking her food anytime it is given to her to show her that I am the boss). It was dealt with strictly, and thus, she has never remotely tried to repeat that incident.