Here is some source links to substantiate my assertions above:

"Osteopathic physicians are licensed to practice in all states. The admission standards and educational quality are a bit lower at osteopathic schools than they are at medical schools. I say this because the required and average grade-point averages (GPAs) and the Medical College Admission Test (MCAT) scores of students entering osteopathic schools are lower than those of entering medical students [4,5]—and the average number of full-time faculty members is nearly ten times as high at medical schools (714 vs. 73 in 1994) [5]. In addition, osteopathic schools generate relatively little research, and some have difficulty in attracting enough patients to provide the depth of experience available at medical schools [6]. However, as with medical graduates, the quality of individual graduates depends on how bright they are, how hard they work, and what training they get after graduation. Those who diligently apply themselves can emerge as competent." Dubious Aspects of Osteopathy

"Finally, there is data that shows that students enrolling at colleges of osteopathy have lower grades than students entering medical schools, suggesting (though this is not proof, of course) that D.O. schools provide an alternative route to a medical degree for those who aren’t good enough to get into normal medical schools." Osteopaths Versus Doctors - Forbes