UMich Rolling Admissions

Does anyone know if the University of Michigan still does Rolling Admissions? I know they did a few years ago, but I can’t find any recent sources that confirm anything. Also, does it matter when I submit my application, as long as it’s before the deadline, if I want to be considered for Preferred Admission to the Ross School? Thank you.

Google works: http://alumni.umich.edu/learning/college-admissions-faq