I call them once a week now. I understand that there are certain conditions that can slow the processing of applications such as holiday time, bad weather, etc, but the fact that people who have interviewed month(s) after me have been moving through the process much faster is really unfortunate (for me). There are only so many spots this school has, and the longer my application is delayed, the fewer acceptances that will still be there once it is finally considered.
Interviewing is expensive, and time/effort consuming to every applicant. Whatever may be the source of this delay is extremely unprofessional on the school's part. If this is indeed because my interviewer has prolonged the submission of their report this long, he or she should not be a part of the adcom any longer.