> I think the only thing undemonstrated for me is how much difference their program makes.
It can be difficult for people who have not experienced it to understand the sort of progress you can make in such a short period of time. I obviously can't speak as to the other hiring bootcamps, but the guided pair programming approach taken by App Academy is very effective for rapid hands-on learning. I had taken a CS class or two prior to App Academy, and the difference is night and day.
Also, there is more to the program than just technical learning. There is a 3 week hiring bootcamp, where everyone works together on the job search process, under the guidance of an App Academy hiring instructor. For people new to the tech industry, this is very effective at bringing them up to speed on how hiring works in tech.
At this point, there are many companies that employ App Academy alumni (including thoughtbot, Facebook, Vimeo, Hipmunk, Twilio, and Zendesk), and many have realized the quality of its graduates, and so whenever a new cohort is getting close to graduation, managers from those companies come to a "demo day," where students can show their capstone projects and get interviews.