Hi!
I applied for the 2 year MSW and I am still waiting too.
i have e-mailed and called the school and received the same information. Essentially, the initial acceptances were sent out, as well as initial rejections. They told me that the initial acceptances have 2 weeks to respond, and once the two weeks hit or someone rejects sooner, that space is then offered to someone else right away. I inquired and they said it is done on an individual basis, so it can trickle in at any time and it won't necessarily be a second "wave" of acceptances. They said it is a process that will take until the end of April/early May, if I remember correctly?
I'm usually a pretty patient person, but I am getting very anxious about all of this. Best of luck to you and your girlfriend, JHC!