Michael, you will only receive a notification if the person tags you in the post.
A good reminder to us all, if you are responding to anyone's post more than 2 weeks after they posted it, a good idea to tag them by clicking the little envelope icon and entering their name.
Since D-Word is set up to be more conversationsal than threaded forums, you would rarely get tagged if someone responds fairly quickly. Yet I'll test it out to see if you do get notified. If not, let us know.