I reply to all comments.  However, WordPress runs a spamtrap called Akismet which deletes everything it determines to be spam.  I don’t get to see those things it deletes, so it does concern me that there might be false positives.  If you leave a comment and don’t get a reply, contact me by the email address in the sidebar.  It’s munged to fool address-collecting bots, but just substitute @ for (AT) and it’ll work.