I am sorry to hear that you had a poor experience with Vanderbilt. I also applied for ACAG (pre-speciality). I was waitlisted, which I did not accept. I did not call them regarding my application. However, every interaction I had with them regarding the application process was poor. I was frequently given miss information or the vague, "I do not know." My final interaction was via phone call and they hung up on me ( I was asking about how admissions decisions would be released). As unfortunate as these interactions were they helped me decide that I did not want to be waitlisted or even accepted. I could not handle paying this institution a large sum, when they can't even communicate effectively or respectfully.
On a side note, congrats to those accepted. While I had a negative experience, I hope all of the applicants/admitted students had only positive interactions with Vanderbilt