Having gone through a bootcamp, I can also say there's the "we know what we're getting," factor. The job I got hired into afterwards, they knew I would be competent to a certain degree because they'd already hired out of that bootcamp before, and the bootcamp had pretty strict standards about who made it to Career Day. That was a definite factor in my getting hired.

Not to say this would or wouldn't justify various tuition rates - but it's definitely part of the equation.