I seriously doubt it! They are good dogs its all in how they are raised, My parents have one that is 5yrs old and she is the Sweetest dog I have ever been around.
And to make my point I heard on the news a year ago that Labs are at the top of the list for dog bites, followed by small terriers!
My Moms pit will lay on the floor and my 12yr old son uses her as a pillow and she loves it!