USe of the term "Traffic" says it all - it is highly likely that no one was manning the ground station and the reply was from someone airborne.
Pace.
Couldn't disagree more with you (or anyone else who thinks the terminology should be changed).
Mayday or Pan get's everyone's attention, anything else is ambiguous and potentially dangerous because there will be a delay in responding and rendering assistance.
There is absolutely no shame whatsoever in declaring a PAN or a MAYDAY, you shout and we'll make sure that everyone on the ground is ready for you, if you discover after landing (or even in the air) that you no longer have a problem, it doesn't matter, we'd rather everyone was there to meet you then than minutes afterwards.