I understand that you are frustrated. But Drexel interviews 1600 applicants-- that is the most in the country by at least 300 interviews just for a little context. They also interview very late into the cycle. I for one am not one to give a school the benefit of the doubt, but you have to understand that very few schools interview into march even. You interviewed in april/march, later than really any applicant in the country, and its going to take time for them to get to your file. You will most likely hear by the end of april or the first/second week of may.