Please direct me to one page, one study, one statistic that says pit bulls are less likely to bite than most other breeds.
With 300+ dog breeds recognized, and 160+ recognized for AKC showing, telling me that poodles and labradors bite more often than pit bulls falls 158 to 298 breeds short of supporting your 'fact.'
The studies are often difficult to decipher because the classifications of breeds are often done improperly, so the more reliable studies are those that show aggression tendencies among different breeds assuming their owners raise them essentially the same.