Wow Brite007 that is a huge generalization about Corso.
The difference in temperament, like in any breed is dependent on the quality of the breeder. There are MANY great breeders out there, who are focusing on the breed and their love for it.
BYB's are pumping out these dogs, like all rare breeds, without a thought or care to proper temperament, structure and health. They are expensive dogs so is a way to make some cash.
A properly bred Corso from a reputable breeder is an amazing dog. They should NOT be shy or skittish, but aloof and indifferent to strangers.
They are not a lab, they do not love everyone, nor should they.
The traditional Corso head, ie- using Basir as the role model for the standard has a muzzle that should be 1/3rd of the total head. That is a fairly short muzzle. I am not saying that in the reconstruction of the breed Boxer, Bull Mastiff, Rottie and Neo's weren't thrown in along the way in some lines.
But if you look at SOME breeders in Italy that stuck to the traditional dogs, not breeding to win ribbons in shows, you will see that the "rustic" heads are quite different to the majority of dogs in both American lines and many of those lines over seas. There are breeders here as well, who are returning to the true type of Corso. Hell, go back to the 60's and look at the Corso and Neo and see if you can see the difference.
Unfortunately IMO, both sides went to extremes to differentiate the two.
http://www.canecorsonancy.info/italy.htm
In my opinion, THIS is what a Corso should look and act like.
I have had an unstable Corso, bred by a crappy breeder and I can tell you there is a world of difference.
Sorry for the hijack
I woud guess the pup is a Pit x Corso as well.
I hope you find it a great home.