0 Pooches: On Meeting Pitbulls and Responses

I never imagined I would one day own a pitbull.

When I was originally looking to adopt, I too believed everything I heard from the media.

I didn't want to adopt a pitbull.
I didn't want a dog that possibly looked like a pit bull.
I didn't want a dog who possibly had any trace of a pitbull.
That is...until I met my first pit bull. And my second. And Miss M became mine.

I suddenly realized, I had never met a pit bull-type dog before. And it became my mission to allow other people to meet our pit bulls, so they could have these same realizations themselves. 

While we have had so many positive experiences where people can't believe our dogs are so different from the terrible stories playing across the media, we have also had some conversations where I'm not sure how to react.
Sometimes after meeting our dogs, people will say "It's all in how they're raised".
Which we all know isn't true (especially in our case since we adopted Mr B when he was already 5. Miss M was 2.)
Or people will say "They're great dogs...until you have kids".

Most of the time this is said by people we just meet on the street, and I know we don't have enough time to really explain why this isn't true, or whether they would really listen to a drawn out explanation.

Does anyone have any good, short 1 sentence responses for when you hear these types of comments?

Also:
If you do own a pit bull-type dog....
How much do people really love pit bulls?
The reality of pitbull owners