well mate, i don't no what bullxs you have been looking at, i trust mine with my kidds life and i also think the bitch would give hers to protect them, as for speed that depends on what out cross and how much of it you use. intelliegence, i think this comes down to the man hoo is holding the lead, if you have a thick f~@ker holding it then you have a thick dog or in most cases the dog has more up top than the bloke holding him, and as for yapping ive not had 1 yap and ive had 5 generations of them, but ive found if you start a dog to soon you will get yappers and that goes for all breeds , but