Where are you hearing that at? The DO schools are doing the same thing as MD schools in terms of increasing class size. With that some more students will fail but from everything I have seen the attrition percentage has remained the same for the schools. I could only find one DO school where the attrition rate appeared a bit more excessive and there was a reason for that which I believe was done away with (this year or last year). Also with hospitals closing and class sizes increasing both MD and DO schools feel the squeeze. Maybe you think US medical schools are just becoming more "Carribean-esque"? Really it's just a sign of the changing times. Ironically some of the newer schools have set themselves up nicely while some of the older schools, both MD and DO, really aren't doing their students any favors.
Give me one MD school increasing their class size to over 200 and I'll find you several times that in DO schools doing the same. If they've got enough staff and TAs/tutors to handle this many more people, kudos to them. When you're on interviews, especially the DO ones, ask what type of support a school has for someone that needs help or is falling behind.
I've seen enough and heard from enough people about this stuff; don't expect COCA or AACOM to be any more willing to publish any information about what's happened in the last 5 years (they're required to get this sort of info from all DO schools to retain their accreditation) than they've been with any other information that would show our profession in a real but bad light.
I hope that the people in the application process see that it's not only important to get in, but also and more so that they finish their degree and are able to get a residency slot that they were actually aiming for.
If you matriculate to medical school, pass your first year but, for any reason, don't graduate, you're 100% sure not to get any residency spot.
If you buy into the Caribbean model that, yes, the DO schools are beginning to follow, you may graduate with maybe 60% of your classmates and have a hard time getting into anything competitive and be glad to take all of the DO FP slots that DO students don't want. Then things will get really interesting. What's acceptable, then, for any US medical school, that 10 to 20 percent of your classmates spent over $100k to attend medical school and were dismissed? Ask around to your fellow DO students in different schools to see how many people their classes, ginormous or not, they've lost per year.
If you go DO, pass your tests with the usual Pathoma, UWorld and Savarese materials and have a grasp on the English language, you can get a Family Practice spot without even trying. Most people, though are going to be setting their sights a bit further into the competitive spectrum of specialties, and that's where the biggest crunch will be. As the ACGME takes over more and more of our leadership positions and allows anyone to apply for DO residencies, I imagine that the Caribbean and IMG students will gladly come in to fill those spots. That's where things will get even more interesting!
As always, I love being a DO, use the more evidence/common-sense OMM when I can but hate how our leadership keeps screwing up and covering it up from prospective students. I think more people are beginning to do more than look at US News & World Report when deciding on deciding where to pursue their training and maybe a few words of reality from (gasp) SDN too.
There's plenty of the DO Kool-Aid out there for everyone, just make sure you know who's putting what in it before you gulp it down.