USN is one that doesn't seem to be rolling admissions at all. They go by a point system. They did notify some candidates early who had a high amount of points because they were getting in anyway but for the most part, people had to wait until all the interviews were complete so they could know exactly where people ranked. I applied on the absolute last day and didn't have a problem. When they go by a point system like that, it doesn't matter if you apply on the first day or the last day.
Every school uses rolling admission of some sort. That's why so many pharmacy students urge pre-pharmers to submit their application as soon as possible.