I do have a couple things you may want to add if you like. I don't know if they will help you out but I have a break down of bite stats from Canada provided to me from the Dog Legislation Council Of Canada. Some of the attacks are quite interesting. There is one in there of a Pomeranian attacking a "Pit Bull" and apparently the owner of the Pomeranian is being charged. There is also another one about a child biting a child and how the ER people said that it is much more common than people think.
Another thing also (again if this will help you) is that from what I understand there is currently 30 registered American Staffordshire Terriers in the province of Ontario and nearly all of them have passed their Canine
Good Neighbour Test (CKC's equivalent of AKC'S Canine Good Citizen Test)
Edited to add: Let me know if you want to take a look at the bite breakdown and I will email it to you.
The reason you all "missed" something is because I asked Miakoda to send it to me so I could read it. It wasn't publicly posted. Do get her to forward it to you though. It is definatly worth the read.