As jwright25 said, every year ADPi publishes that alums won't be getting a phone call. We used to but the policy was changed several years back. From what I've been told and it may or may not be accurate, the primary reason for the change was that on so many campuses the number of legacies going through Recruitment was huge. There just isn't time.
For example, as I recall last year at one SEC school there was 1 1/2 times quota of legacies going through. My memory is hazy but quota was somewhere around 80, so that would mean about 120 legacies. Invite lists are typically due at about 5am. Even if MS sessions end by say 2am, the Recruitment Team still needs to generate the actual list to submit to Panhellenic and that takes time. The invites are then distributed to the pnm's at around 8am. It's impossible to make all those calls for the simple reason that the actives and advisors are busy with the next round of Recruitment. Or maybe trying to get some sleep.
Once Recruitment is finished we send out letters telling an alum where their legacy ended up.
As a parent I can understand the anger and frustration of not receiving a phone call, but as an advisor I appreciate not having to make those calls. They rarely go well. Each year I still field numerous calls from angry alums. They demand to know why and I can't tell them. I've heard threats to turn in their pin and/or quit contributing money. Some even call HQ or the University to file complaints.
We don't release legacies frivolously, but we do release them. Sometimes we have to because of the sheer numbers of legacies going through. I feel horrible for all the mothers, sisters, grandmothers out there when that happens. But please ladies know that being a legacy no longer means a guaranteed bid. Those times are long gone.
Allow me a moment to vent with one last comment to alums, please find out what the minimum GPA is for the Chapter in question is before calling up to complain. If it's 3.0 or higher and your legacy has a 2.5, please don't call. You and more importantly she should have been thinking about this back in HS. Being a legacy doesn't compensate for poor grades.