No one in their right mind would ever say DO’s are starting to outperform MDs. I think what the reality is, is that it does show that the top 1% of DO students are capable of hanging with the 'big dogs' (quote unquote). Honestly, these DOs are kids that probably fell through the cracks and would have been capable of succeeding regardless of wherever they are. It is really great to see that DO's are starting to match into such baller ACGME residencies (Integrated Plastics? Derm? Rad Onc? Orthopedic Surgery? Would have been inconceivable when I was going through school) but remember that they are the exception, not the rule, and to not expect to replicate their success (even if you were an MD, many of these specialties would be extremely difficult to get into.)
What I am trying to say is that they put in the work to remove any possible skepticism about their application. Probably DESTROYED the USMLE. Rotated at their respective programs and showed up to WORK, engaged and motivated, and answered any questions about their potential to hang with their MDs. They were probably very easy to get along with, cheerful and complained very little (if at all.) They probably have very compelling life stories/experiences that just DRAW people to them. Wouldn't be surprised if they're physically attractive as well. That's a recipe for success for ANYONE, doesn't matter if you're an MD/DO/FMG. Programs just want people they can stand on a personal level for four years, so in addition to being a rockstar so do your best to be likable without being annoying (don't have an ego, don't be defensive, take instruction and criticism well, don't give BS excuses, show up to work, don't be lazy, don't throw other people under the bus, don't talk ill of your school, your program, or anyone else in general.)
Unfortunately if you look at the average match list between an avg DO school and MD school, the disparity between the quality of the avg D.O. student's match and avg. M.D. student's match becomes very easy to see. I believe going forward into the future, any school that does NOT adequately prepare their students for the USMLE (or even encourage them to take the USMLE), will be setting their students up for failure, especially with the merger happening. I believe the sky is the limit for DOs if they put in the same work that are expected of their MD counterparts.