Any dog breed raised in a loving family environment can turn on a person in my opinion. I used to volunteer at a shelter and walk dogs during my lunch break from work. I took a liking to a particular Rotweiler and she was abused in the worst way. I would have trusted her Stewie in a MINUTE.
Who decides which dog breeds are more likely to "turn on you"? The police? They have no idea. So many cases of little "sweet" dogs causing some damage go unreported. The media is biased against certain breeds and therefore we don't hear too much about them.
I'm sure this is going to be controversial, but I think that breeding Pits is awful. There is no demand for them and there are thousands upon thousands of PUREBRED AKC standard to a T in shelters across the country.
My baby bites me allllll the time. It just doesn't hurt as much because he is 6lbs. But really, what is the difference? I would have trusted my 100lb Lab with a newborn or toddler before I would trust Stewie. I much prefer big dogs to little dogs. They are more loyal IMO and more intelligent. I think big dogs, especially Pits and Rotties and Dobermans get a bad rap.
Please read this webpage and especially, LOOK at the pictures.
http://furryfriendsfoundation.com/Truth03/Truth03.htm and then click around and look at all the poor Pits that are up for adoption and read their stories.