>>Without equivocating, I would say that the general trend does indicate admitted males having lower stats
Data I've seen indicates that male and female college-bound seniors have very similar mean GPAs, but males have higher mean SATs (with a narrow advantage in CR and a wider one in Math).
Other data I've seen suggests that SAT scores are more strongly correlated with success in college for women than for men. I don't know if SAT scores also are more strongly correlated with high school grades among girls than among boys.
Sources:
http://www.ets.org/Media/Research/pd...n_allspach.pdf SAT and Gender Differences
I'm sure there is much about these differences that is simply not well understood. However, I suspect attitudinal differences play a significant part in any higher incidence of males whose grades don't measure up to their test scores.