Is that E for emergency fuel, or the ICAO standard phrase "Mayday" fuel (or "Pan")?
Point is, the FAA's P/CG is full of non-ICAO phrases. To use the phrase "Emergency" outside of the US could have the same result as using the phrase Bingo. Why is it that the FAA uses some ICAO phrases, such as "line up and wait", and not others?
The point of the article is a good one; make sure that the controller knows what you're talking about!