The Quick Start Programs know which boxes need to be checked on interviews and in training. They can train to the checkride and ignore everything not applicable. Not much different than knowing your local D.E.'s "standard" checkride and training to it. Frankly, the PTS and FAR61 requirements even leave holes. As long as they never run into any situations outside of what they were trained for, all is well.
It works because the low timers are coming in with what they need to know to get the job, make it through the training syllabus and get to IOE. The IP's are the ones stuck getting them signed off and the line captains are the ones who are babysitting and keeping them safe and legal while they learn. Just like any other certification or qualification, it is the minimum standard and just a chance to learn more. Just like a new Instrument Rating, it is a great opportunity to learn a lot about flying or get dead fast. The big trick is knowing what you dont know and acting appropriately.
Kids, if you are thinking about an airline career, learn as much as you can about flying. Do yourself a favor and teach others how to fly. Teach primaries, teach a LOT of instruments, teach commercials and ATPs. If you arent interested enough to soak up everything related to flying and be the best possible instructor you can be, flying is probably not for you. Lose a bit of seniority down the road? Sure, but the industry is such a krap-shoot, who can tell if that year or two would make much difference in the long run? Luck may have it that waiting will benefit you greatly, especially if you are able to get a better feel for the industry before pledging you allegiance to any given seniority list, and have the qualifications to go for the one you really want.
If you dont LOVE the act and challenge of flying, do yourself a favor and go into another profession, you will be much happier in the long run. The pay, the lifestyle, the prestige; they are gone- or at least slipping away.
Ok, Ill come down off my high-horse now.....