Here's what the University of Utah SOM has to say on the subject:
Leadership
Leadership is defined as a position of responsibility for others, with a purpose to guide or direct others. Dedication, determination, ability to make decisions and a willingness to contribute to the welfare of others are indicators of one's ability to succeed in medicine. Individuals with these characteristics readily accept positions of leadership and are an asset to their community and profession. Leadership capacity can be demonstrated in a variety of ways. Positions in employment, church, the community, and
school organizations including coaching, tutoring, and mentoring will satisfy this requirement.
- The minimum leadership requirement is one leadership experience lasting three months within the last four years.
- The average applicant has three different leadership experiences each lasting three months within the last four years.
Drexel doesn't use the word "leadership" on their admissions website, but lumps it into community service:
- Service orientation/community service – a successful applicant will demonstrate significant commitment to community service so that applicants can gain a better understanding of a physician's role in a community and how that community may influence their patients. Examples of significant community service activities include, but are not limited to: tutoring or volunteering in a health care setting, shelter, or other organization. We recognize that students may have variable amounts of time due to other meaningful activities. These activities will be reviewed in the context of other time commitments.
U WA lists as "must have experiences: •
Leadership = guiding others, being responsible, initiating change, working toward a common goal. Meaningful engagement with others Being inclusive and creating commitment. Helping others rise.
BTW here is a really useful source of what they look for. This is NOT unique to them:
http://www.uwmedicine.org/education/Documents/md-program/TheApplication-2016.pdf
I'm wondering how of you actually go to school admissions websites and check these things out.
Anyway, on the other hand, NYU, Wake Forest and Stony Brook say nothing!