You will hear lots of stories about people getting in with very low MCAT or GPA's. The reality is that usually one of the two are low (< 27, < 3.3) and not both. If both are low, then chances are the person did research (Ivy/NIH or otherwise top level stuff and is published or did presentations at International Meetings), did a post-bac or other grad program, knows someone (either current students at a particular school or someone of considerable stature), had some really good reason (like family/personal issues), is a URM or otherwise foreign born with English as a 2nd language, non-traditional, other EC's, # times applying, CEO of a company, distinguished athelete, philanthropist, worked at an AIDS clinic in Africa, etc..... or any combo of those. Furthermore, few people are distinuishing b/t MD/DO. While I feel both train competant physicians, there is no secret that DO schools especially look at other factors besides #'s.
My personal story is that I had a low GPA and a 29 and then a 28 (best combo = 31) MCAT. I did Ivy research, I am published (2nd author on an article, 1st author on numerous abstracts, author on even more abstracts), I did 2 talks and a poster presentation at International conferences, I did a post-bac, and I applied 3 times. In addition, my undergrad GPA had an upward trend (Freshman year ~2.5, Senior year ~3.9). Furthermore, I was an EMT >6 years by the time I applied, and had a ton more EC's (shadowing, sports, leadership roles...) It wasn't until the third time that I got off waitlists and got lovin from 2 allopathic schools (I didn't try for a third b/c they were habitually waitlisting me...so screw them!!)
I'm not suggesting that you need any of these variables, but you really need to wonder the particular situation of each person. If all I did was say that I had an undergrad gpa of ~3.1 and 29/28 MCAT's and a 3.5 grad gpa, then you wouldn't get the full picture.
Good luck, and feel free to PM me with any specific q's you may have.