I was called by a principle at a black school where I put in a resume. No message was left on my answering machine, which leads me to believe that when he determined I was white, he no longer wanted to interview me.
Personally I hate leaving messages, and usually dont. But I guess if you're getting a call back from a potetial employer, he'd have to leave a message right?
BTW, not all black people, "sound black", so I dont think thats it.