This is coming from NYU Internal Med FAQ
http://medicine.med.nyu.edu/education/im-residency-homepage/faqs#dd
At least NYU has no shame in publicly admitting to it, but there are plenty of programs that will never take you even if they don't post it in their FAQ, no matter how talented you are, simply because you're a DO.
Do you really want to be idealistic in this point of your life or
realistic? What if you excel in medical school and want things like ACGME Derm, ACGME Ortho, ACGME surgical sub-specialty, or even in love with some Internal Med programs but realize that you could never touch those, not because of your resume, but because of being a DO?
People will tell you "you're gonna match fine" and yes, you may...but you rather have 95% doors open (some programs only want applicants from elite MD schools) then to proactively go to a school where your doors are only 75-80% open??!! Use common sense.
MD > DO > IMG > no acceptance