I didn't but I know of someone who went through one of those programs and did land a job (but its because its structured that way i.e. to help these new devs find entry level work). The pay obviously reflected entry level and in the specific case of the dev I know, he still struggles a lot on the job but they hired him fully understanding that he needs guidance and thus proceeds accordingly. He gets stuck a lot at work and obviously isn't a self proficient programmer at this point but can ultimately understand and get stuff done (with help).

Every program will be different but I suspect a lot of the results will be the same given how fast the time frame is for them to go from non-programmer to programmer.