The cabin looks still intact and the outcome would would probably be different, if there was an engine in the front of the car. Still I believe those 5 peoples were very, very lucky. In my opinion this is just PR. You'd probably find examples like this for all car manufacturers.
Now that is impressive. The safety systems are all designed for humans and yet a dog in the backseat, who could probably not be properly secured, survived.
http://www.sosubaru.com/dog-safety-harness.htm
Dog safety harnesses don't get anywhere near the scrutiny seat belts do.
...and yet I see those little dog test-dummies and I want to shove money through my screen despite the fact that I don't even own a dog.
Humans are silly...
In the case of the car itself flying, and possibly tumbling on impact, I don't think the odds would be that good, as the dog would likely impact against hard surfaces. Or other passengers. That's maybe the least of the problems though, if the car's structural integrity is compromised...
I bought a new harness, with the largest contact area I could find, specifically for car usage.
Serious question. Smaller animals have less momentum and are more robust to a large deceleration.