I think a more accurate statement would be, "anything works better than dogs"Yup! Dogs work better than anything. I would trust my dogs before I depended on my security camera's.
Dogs warn off bad people.
Two seconds of time..... a .22 in the skull of your dog and your security has been defeated. An idiot criminal may be scared off by a dog but no one who has half a clue will be no more than a bit delayed by a canine.
A security camera with motion detection that sends an immediate email to your Iphone or blackberry and records a photo of the intruder is far more valueable than a dog....
but I guess a dog is cheaper.