Graduation rate would be a good figure to publish on their site. I searched for it out of curiosity, and according to the CEO they have ~85% graduation rate.
This figure is not audited, and Lambda school only recently switched to 9 months from 6 months, so saying that it’s 85% for a “9 month program” is misleading if most of their past cohorts were on a schedule much shorter than that.
That said, .15 + (.85 * .15) = 0.2775, the proportion of the student body who either didn't graduate or didn't find a job within 180 days of graduating. So there is a significant fraction who might regret attending the program. But it still compares well with universities.
Usually a big component to these programs are weekly exams to make sure you’re on track. I’ve looked into some of the local ones and usually if you fail a few you will be dismissed from the program.
85% means little if Lambda has a low bar to dismissing students that are struggling and not keeping up with the material.