Maybe when you call places instead of asking them questions about the temperments of the dogs, you should just ask if the parents are on the premesis and go see them. Then you will know for sure how the dogs really act, exspecially around a stranger.
Or you could take it as the people who think that you want to the dog to fight it, are actually good breeders becuase they dont want their pet to go to that type of home.
I work at a Vet and see a lot of Pits. Another thing i can tell you that might help is if you search for "American Staffordshire Terriers"....that is the AKC name for pit bulls, which most snobby (non fighting breeders) will use.
There are rich people who come into my work and I"ll ask them so you have a Pit Bull, and they will say NO!! I have an American Stafforshire Terrier...and in my head im thinking "Ugh lady you own a Pit"