It really pisses me off when people let incoming emails marinate in their inbox. The people who feel that making you squirm for an answer gives them more power.
I've been emailing a lot of different wineries, and most of them have not been prompt in their replies. Two of them were on time, but the others? Just havn't bothered to send any kind of acknowledgement or reply. Come on, be professional. You should be happy that such knowledgable, passionate wine tasters want to visit you. My demographic is the market share that will propel this industry into the world of fine wine, so I don't get this cavalier attitude that somehow, we should feel privileged for the opportunity to taste your wines.