The new hire I ate lunch with at AAs training center yesterday said that his class was a few military guys mixed in with mostly flows. His interview group was 20 people all of which were military and he submitted his initial application in October 2014.
Everyone I know whose got a flow agreement is applying to jobs elsewhere to get a seniority date quicker, but they're the only ones who have a seat in class at a legacy airline in their back pocket as well.