Id say its the opposite for Bulldogs pits n Mastiff 100%.
Scold your Mastiff(pressure) and tell me they don't look away.
Have a Cane Corso with intensity on your arm n ill buy you lunch if he doesn't go crosseyed on the bite.
That being said I'd attribute that conviction you see to the Helper work, not the breed.
Mark C. is a great Helper this I know first hand.
E-Dog - 2012 WPBTCA National Championships
The time when screech owls and Bandogges howl and spirits walk and ghosts break up their graves.
Act I, Scene IV of William Shakespeare's "King Henry VI"