Keep in mind, it has a lot to do with where you live, particularly the
altitude. I live in Denver, 5280 ft high, and water boils at 202 deg F,
not 212, as it does at sea level. Makes some difference when cooking
things like eggs. I imagine the other posters are at sea level or close
to it. If their methods work, go with it.
If not, it's really simple to figure out how long to boil them, or let
them sit, if you prefer that method. I did it up here, once, and now
know how long it takes here (about 13 min in boiling water).
Put at least 4 eggs into the boiling water. Use either method to cook
them (heat on/water boiling, or heat off/water cooling). 2 min before
the prescribed amount of time, depending on which method you're using,
take an egg out and crack it and slice in in half. If it's done, you
now know your time. If not, sprinkle a little salt on it and eat it.
That should take about a minute, when you take the next one out and
test it. Repeat as necessary. Now you know how long it takes to boil
eggs where you live.