It may also be that many boot camp students are from non analytical backgrounds, and thus lack some skills that are hard to teach. We've hired a boot camper who outperformed all the CS grads in contribution and continued learning. Most applicants struggle with things they weren't taught, we try to work through tech they haven't used before (during the interview) to gauge how well they learn / explore.
In short, it really, really depends on the school and more so the student.
I work for a fortune 500 company. They are open to the idea of recruiting bootcamp graduates, however the interview process is still very CS oriented which BC graduates lack experience in. I'd say that's pretty much the only reason they don't make it through. Hopefully it changes :)
In short, it really, really depends on the school and more so the student.