I certainly understand your frustration. I didn't hear from a handful of programs, but I think there may be a reason they wait this long. I'm not sure if you noticed or not, but on my end the few I did not hear from were not the Carolinas, Wake, Vandy, or Cinci's of the EM world, but instead the lesser known about programs. My guess is that they don't want to send out too many rejections too early because they know they are going to get many cancellations the last interview month. So they want to be ready to call people a week or two in advance to see if they are still interested in interviewing. I got an invite right after New Years and declined. Its not much of an issue for places that are decades established, but newer, less popular places have to be really careful not to burn their bridges. Thats my guess.