When I called ASDOH to check up on the status of my application, they thanked ME for "taking the time" to call and check in with them! That surprised me, given their large # of applicants.
NYU, Case, Creighton, and UOP were all nice on the phone. (I was calling to check on my committee letter, which was mailed directly from my school instead of through AADSAS, due to a time crunch).
UW was a challenge to get a hold of (left 2 phone messages, and emails weren't going anywhere), but they were nice once I finally did. Their phone message says they are very busy and understaffed, so I'd recommend not calling unless you need to call them (I had two specific questions I believed justified a call), and your questions are NOT "Have you looked at my application yet? When will I hear from you?," etc., etc.