Notice that the person in your example made the announce immediately before the event, when it would directly influence the communication. Letting HR know befor

Notice that the person in your example made the announce immediately before the event, when it would directly influence the communication. Letting HR know beforehand that you stutter (and you can't be sure that your interviewer will be notified of that, too) is different IMO. So your example reinforced my point of view as well. =)