No I haven't tried getting in touch with them. I was under the impression it's not proper. I also must have been completely wrong about this process, I thought they had to let you know something, anything, by April 15th.
So I am in the same situation. I applied to four schools, and I haven't heard anything from three of them. It's now April 26th. Not a yes, not a no, not a maybe, absolutely nothing from three schools. I have no idea what to think at this point?