I think what eloff hits on is a gating problem in the choices that each sex typically makes in eloff's construction of their interactions.
Successful women want to marry someone as or more successful, making their pool smaller. Men don't tend to worry as much about marrying someone as or more successful as them, so as you move up the "success" distribution, women have ever fewer choices, and men even more, causing a lot of mismatching problems for women above [x] percentile.