I've worked with two folks from (Bay Area) bootcamps. Those two were fine junior developers; compare with someone just out of school. One was actually quite a bit better than someone just out of school, because he was a bit older and had real-world experience that filled in a lot of blanks.

Not saying that's normal. But my very limited experience with bootcampers has been positive.

Yes, they were hired for the same reason bootcamps exist: demand.