My Jack Russel Terrier will bite if provoked, especially if you grab him or startle him. All dogs will bite, from Chihuahuas to Mastiffs if startled or mistreated.
The Dalmatian, according to The Animal Planet, is more likely to bite someone as it can be more easily startled. And no, not all dogs will bite if startled. Alot of them haul *** and some will circle around to wind it's threat, then decide what it should do. The majority of dogs I've unknowingly slipped up on hauled ***, there were a few that immediately went to me.
Ben now that you mention it the Setter has been the worst for me too, second worst was the pointer. Really the fiest was but they don't count.