I don't know what to believe these days, all the reports of dog attacks seem to involve pit bulls or pit bull mixes; no Dobermans, no Shepherds, no Dalmatians, no Rottweilers, no Setters, no Retrievers.........
I love dogs, but am no particular fan of Pit Bulls, although I've seen and petted many very friendly ones, but the nature of the media is such that they look for trends. So it may not necessarily be that other breeds aren't attacking people, but rather that those incidents are just being deliberately under-reported.