it really is hard to say because there are so many variables. if we take the human element out of it, then I would say no, the average pit bull is not more likely to attack. My wife knows this better then I do, but I think pit bulls in particular have been used in dog fighting (and lol, my wife isn't running a dog fighting ring, she has just written papers on this and stuff) because they are more obedient with humans and also more inclined to be aggressive with other dogs. But many breeds have similar characteristics. there is the fury dog breed from China (totally escaping my mind) that really is nasty with other dogs, but they are less likely to be human friendly then pit bulls.
but in reality, I would say they may be mostly due to where they are located in the country and potential owners. I live in Philadelphia, and when we went to look for a dog from the local SPCA they had something like 450 dogs, 440 of them were pit bulls or pit bull mixes. So you likely have less responsible owners, etc. who are more likely to get a pit bull then a golden retriever. but in essence, this isn't the pit bulls fault.
@eeoman pointed out a stat about more Rotty attacks in the 80's and early 90s. I think that clearly shows the breed isn't the issue, it is more so on the owners and who is taking these dogs in.
if we are talking breeds more likely to maul humans, I think German Sheppards would be up there high. now these are police dogs and are great training dogs, but at the same time they are protective and are stronger then most pit bulls.
ETA: my wife cares about this more then i do. here are her thoughts:
" Aggression towards humans and other animals are two completely separate issues and have nothing to do with one another. Terriers, in general, are more prone to aggression toward other animals so I would say they are more likely to have issues with other dogs. However, there are definitely exceptions and you cannot assume that every "pit bull" is going to be dog aggressive. Every dog is an individual. Ours pit has been run up on and gone after by countless little yappy dogs and has never done anything more than bark to correct the other dog. As for aggression to humans, I would say that a pit bull is no more likely to attack a person than any other type of dog. If you look at temperament testing, "pit bulls" test about the same as golden retrievers (actually a little higher). Below are stats from the American Temperament Test Society. " Of course this is statistical information that is collected by people who are actually credentialed and work in the dog behavior field, so I doubt your anti- pit bull people will believe it, but there it is. I'm sure they will point out the lack of golden's in the news, but how many golden's are being kept chained up in someone's backyard or basement, abused, neglected, and under socialized? These are the types of dogs who generally cause harm to people, whatever the breed. ####ty people aren't keeping Golden Retrievers chained in their yards to look tough, otherwise we'd hear about them on the news too."
https://atts.org/breed-statistics/statistics-page1/
https://atts.org/breed-statistics/statistics-page4/