That's ostensibly true, and I've experienced being bitten by small, nasty-tempered dogs a number of times in my life. But the thing is, those small, nasty-tempered dogs confined their aggressiveness to a bite, and once they made their point, never went in for the kill, not having the size or the inclination to do so, even if that's what they had wanted.
You are going to be attacked by one of two angry, snarling dogs. One is a pit bull, the other is a papillion.
Choose.