I am not a medical student, but I have asked program directors about this. Every speciality emphasizes research differently. The emergency medicine director told me they really do not care about research. They heavily are concerned with your clinical and SLOES. Also how well you mesh with the residents and faculty. I have a few friends at KCU and many use the summers to do some clinical research or those fellowships they offer that adds a year. Also, i'm sure those who got into competitive specialities at great programs probably had somewhat of a respectable step score, especially since historically KCU does exceptionally well on them. I don't know what that means for us tbh since USMLE could be potentially pass/fail by the time we take it. My friends told me that those who really needed/wanted research found time to do it, but it was not easy to balance.
That's just my 2 cents. If someone else wants to add on to this please do.