I suspect I am BU and that this thread will descend into breed-bashing madness but as an antithesis to all the recent big dog-hating threads I'm going to tell you anyway.
I was walking my Beagle cross and Chihuahua when I noticed it walking with two (stereotypical bull breed owner looking) young men. I pulled my dogs to the side of the path partly because we were being harassed by an offlead obese chocolate lab owned by an old lady who either didn't notice or didn't care that her dog kept getting tangled in my Beagle's lead, and partly because my Beagle is a pup and I like greetings to be controlled as he can get over-excited.
The lads politely asked if the dogs could greet each other and I agreed. The first thing I noticed was how utterly stunning this dog was. It had a gorgeous, shiny blue coat and was clearly very well taken care of.
The next thing I noticed was how impeccably behaved it was. It stood between it's owner's legs as it was told to and politely greeted both my dogs with perfect, relaxed body language and didn't bat an eyelid when the obese lab tried to mount it.
Its behaviour was so calm and confident that my chihuahua, who had so far hidden from all the offlead spaniels, JRTs, and Labs who tried to greet her, ventured out from under the Beagle and said hello to it.
The lads told me it was only 11 months old and they've been socializing and clicker training it every day since it was 12 weeks old and it's just passed its Good Citizen bronze award.
It's the first time I ever met one of these in RL and I am besotted. It made a refreshing change to all the "friendly family" dogs who run at my on-lead dogs without invitation and jump all over us. I would much rather encounter a hundred of these dogs than one more out-of-control, off-lead springer spaniel.
Anecdata, I know, but it does support the theory that it is the owner and not the breed to blame for the recent rise in attacks by these dogs.