No not at all. Okay, we'll remove the word "slightly"- scores are lower for DO applicants. That's a fact. That being said, everybody knows it comes down to more than MCAT and GPA. If a DO applicant has a 24 MCAT, I do believe that they will likely need an amazing GPA and amazing work experience to compensate for that fact. My point was DO will be more forgiving than MD, meaning that where the MD school would say "24? No way," the DO school might at least give you a chance to compensate w other factors (GPA, job experience, etc). But you Would still have to compensate somewhere, even for DO.
I suppose in my head in envisioning a Venn diagram. Even a bell curve. To the right of the bell curve are the best MD applicants, to the left are the worst DO applicants, but the majority of people fall somewhere in between, when All application factors are taken into consideration. My belief is that MD schools will put more emphasis on MCAT and GPA. DO will accept lower scores, generally with contingency that you can compensate elsewhere (work/clinical experience).