Unfortunately, I would have to say the answer is no, since in my experience, DO schools don't teach a holistic, preventive philosophy. I keep waiting for that class where we learn anything about preventive medicine, nutrition, or counseling patients, and now that 3/4s of my pre-clinical education is over, I am coming to the conclusion that this class doesn't exist. The AOA gets a lot of mileage out of marketing DOs as "holistic", but when it comes down to it, I think many allopathic schools have actually made more of a commitment to exposing their students to holistic/preventive medicine than have DO schools.
It is, however, reason enough to go to a DO school to learn OMM. This will give you an extra tool to use in diagnosing and treating patients, and if you choose later to learn preventive or "holistic" medicine, will integrate very well into your practice.