Yes they are. They are the most wonderful dog breed around. They are docile around children, making them a very good family pet, but fierce if the home is in danger.
I do want to point out that there aren't any "worthy" American Cane Corso breeders (there is only ONE that I love to death and he is an awesome person and breeder). All the Cane Corso breeders here in America (except the one that I love) don't know how to breed for the true Cane Corso. They are normally VERY blocky, short and stocky, in America. They are NOT meant to look like an American Bully.
For the price you'd be paying for a Cane Corso in America, you can a much better, true Italian Cane Corso.
If you'd like, you can message me and I can give you two breeder's URLs. They are very worthy Cane Corso breeders, one being in America and the other in Italy.
But all in all, they are an AMAZING dog. The only true coursing mastiff.
EDIT: Any dog can be a dangerous dog. And they are not "as" banned as the Pit is. Like said, American breeders want the Corso to look like a Pitbull/American Bully and they treat them the same way; ie fighting and aggression. Going to a reputable breeder WILL prevent that. Even if you choose an American breeder, do make sure that they health and temperment test their dogs.
And also, with ANY dog, you MUST have a "firm" hand and train and socilaze the dog from Day 1.