I applied for musicology at UCLA and music theory at UCSB (my research area is somewhere between the two!). From looking at last year's results, UCLA and UCSB seem to send out results later than private Ivies.
I've just discovered this thread! I have applied to 5 schools, have interviewed at one but haven't heard from any others. My third letter of recommendation wasn't uploaded until late January so I'm worried my application may have been overlooked. Currently debating whether I should send emails out to the relevant admins but I'm not sure of the formalities.