I sent out four snail mail queries today, but didn't get any responses at all, either e- or snail mail.
As it's Friday, I'm quite sure everyone has already left their offices to start the weekend. I will have to sit here and nibble on my fingernails until Monday. (Although last Sunday I got two rejections.)
So far, since January 3 I've sent 20 queries and have gotten one partial request, five rejections, and one bounced e-mail.