Even I remember thinking that 716 seems odd for a median but I did not dig deeper, after seeing both your posts I went to Wharton's page and checked and they state Average is 716. Maybe BW made an error?
https://mba.wharton.upenn.edu/mba/admissions/dates/#profile
Class Overview
Total Applicants: 5,622
Total Admitted Applicants: 1,219
Total Enrolled: 825
Male: 67%
Female: 33%
Minority Students of U.S. Origin: 27%
U.S. Citizens: 58%
U.S. Permanent Residents: 6%
International Students: 36%
Full-Time Work Experience: 99%
Average Age: 28
Average GMAT: 716
GMAT Range (middle 80%): 670-760
Average GPA: 3.5
GPA Range (middle 80%): 3.1-3.8
Countries Represented 60