I'm sorry but that link is total crap. Pit bulls are NOT the most aggressive breed... not by a long shot.
Pit Bulls are known as nanny dogs.
They were bred to be GREAT around people of all ages an in the 20s and 30s they were America's FAMILY dog... much how Labs and Golden Retrievers are thought of today. They were bred to be DOG aggressive and dog aggression DOES NOT EQUAL human aggression. Its only in recent times that poor breeding and lack of socialization has created animals that are unstable.
You wanna know why there are so many pit bull "attacks"???? Because there are MORE of them in lower socio-economic societies around the country. Because thugs and low lives decided that this breed was going to replace the Rottweiler as their status symbol. The statistics are completely skewed.
Take an area and compare bite statistics... in the area there may be 1,000 pit bulls but only 200 chihuahuas and only 500 Labradors... WHO do you think is going to have more bite statistics??? The group with the larger number of animals.
Not to mention.... People mistake and wrongly label dogs as pit bulls all the time. I've seen everything from Labs to Boxers to Rottweilers labeled as pit bulls.. wanna know why??? Because people don't know jack crap about breeds and identifying them and because saying Pit Bull bites Man will get more readers than "Man attacked by dog".
The fact of the matter is.. The "most aggressive breed" used to be the Doberman, then it was the German Shepherd, next it was the Rottweiler, now it's the Pit Bull. What do each of these breeds have in common? They need a lot of training and correct handling to stay out of trouble. They are strong and strong willed breeds and sadly each and every one of them has been maligned due to being picked by the scum of society as the status symbol dog.
Can you pick out the pit bull from these? Be honest.