I've seen this on occassion, particularly with new users, where they post an answer which in itself is either a question or a comment. E.g.
"I also experienced the same problem, would appreciate help. Thanks"
These kind of posts are normally flagged and users comment on how the OP should instead ask it as a new question.
But sometimes when nobody has commented, a moderator will add a comment and then almost immediately after, delete the post. In this instance, does the OP get notified of the moderator's comment?