I have no experience with fraternities or sororities. I would consider the single-sex nature of sorority housing a plus for my daughter. A recent study, cited below and discussed at

http://www.psmag.com/navigation/boo...-likely-graduate-time-greek-women-75861/
Fraternity, Sorority Members More Likely to Graduate on Time
BY TOM JACOBS
Pacific Standard
March 04, 2014

finds mostly positive effects for sororities.

http://www.sciencedirect.com/science/article/pii/S2214804314000147
The impact of Greek organization membership on collegiate outcomes: Evidence from a National Survey
P. Wesley Routon, Jay K. Walker
Journal of Behavioral and Experimental Economics
Volume 49, April 2014, Pages 63–70
Abstract
Using a longitudinal survey of college students from over 400 institutions and a propensity score weighting framework, we examine the impacts of college fraternity and sorority membership on academic outcomes and general facets of the college experience. Our results suggest a mixed academic effect for males and a positive academic effect for females. For both genders, we find evidence that membership increases the likelihood of graduating on time and graduate school aspirations. For males, however, there appears to be a small, negative impact on grades. For both genders, we find that Greek membership increases the frequency of alcohol and cigarette consumption and decreases religious convictions and religious service attendance. Lastly, Greek organization members are more likely to participate in student government, perform volunteer work, and begin their careers immediately following graduation.

Other research has found that fraternity members are more likely to attain leadership positions:

http://www.theatlantic.com/educatio...nts-were-in-college-fraternities/283997/
18 U.S. Presidents Were in College Fraternities
Do frats create future leaders, or simply attract them?
MARIA KONNIKOVA
The Atlantic
FEB 21 2014

Quote
Citing data from the Center for the Study of College Fraternity, DeSantis charts some impressive figures. Fraternity men make up 85 percent of U.S. Supreme Court justices since 1910, 63 percent of all U.S. presidential cabinet members since 1900, and, historically, 76 percent of U.S. Senators, 85 percent of Fortune 500 executives,and 71 percent of the men in “Who’s Who in America.” And that’s not counting the 18 ex-frat U.S. presidents since 1877 (that’s 69 percent) and the 120 Forbes 500 CEOs (24 percent) from the 2003 list, including 10—or one-third—of the top 30.
At Harvard, "Record Number of Women Rush Sororities" http://www.thecrimson.com/article/2014/2/12/record-women-sororities-rush/ , suggesting to me that sorority membership is compatible with academic seriousness.