University of Iowa Early Decision Nursing Acceptance Dates?

When I went to Iowa for a tour, I was told that the nursing program usually fills up with Early Decision students every year. The only chance I have of getting in to the nursing program is if I apply Early Decision, but that is binding. I am not entirely sure if I want to go to Iowa yet, but I want to get my application in. Does anyone know when those acceptance letters come back? Is Early Decision just like regular Iowa by having rolling admissions and you find out if you are accepted quickly after you apply, or do all early decision application acceptances get released at the same time? If the results come back quickly after you apply, I want to wait until the deadline so I have time to make an official decision, but if the results don’t come back until after the deadline, I am willing to send in my application now so that I can just pull it if I decide to go elsewhere. Thanks!!