Cartman - you are cynical! If a pilot declares that there is a medical emergency on board you have an obligation to do what you can to help. No point in resorting to the rule-book, stating that if they don't say PAN you are going to ignore what the pilot has said, because in today's world I suspect you will be potentially liable for negligence.
We British can be very stuffy and pompous, and this posting started off like that. Nevertheless it is probably a posting worth making, but the bottom line is - the world has moved on: you have to respect your fellow professionals even if they are not following procedures.
If anyone says that they have a medical emergency on board, you HAVE to take heed of it, whether or not they say PAN, PAN PAN, or MAYDAY. Being "correct" is not always being sensible.