It does matter. The longitudinal proposal would be requiring five years for someone get a medical degree so if you have hopes of going into anesthesiology or PM&R, for example, you'd be extending your medical training by one year because you'd have to do a residency in that AFTER your 5 years of medical school. Not to mention the only way this will work is if all the clinical sites are on board because that's how the students get their clinical experience. The ACGME is taking over all the sites with residencies, so unless DO schools pull out a ton of new sites that don't have residencies in order to accomplish this, it's a lost cause.