I applied to three schools only and I only contacted a prof at one. She was very responsive and I got her to allow me to sit in on a couple of her classes this past fall term and met with her in her office hours to disucss the program and my interests for half an hour. But when I returned to sit in on her class the next week, she didn't remember me at all! And there were several other potential applicants auditing the same class, too. I haven't heard but I will soon apparently--doesn't look good.