Some quick observations:
I call it the "Julia" method cuz that's where I learned it; from one of the books...not the great cook, herself, alas. I'm sure the procedure's come under many an imprimature.
For myself, I'm looking for whites that seperate cleanly from golden yellow fully-cooked yolks. Off-heat 12 min. gives me this as well as eggs that seperate smoothly from the shell. I've heard that older eggs seperate from the shell easier than fresh(er) eggs. Anecdotal evidence supports this as in my experience "newer" eggs tend to make a mess in the peeling leaving them good for nothing BUT egg salad.
Of course, one can lower the off-heat time by minutes reflecting a softer boiled egg.
funny story?
Once visiting friends outside of Mainz, Germany, I went downstairs of our hotel to partake of the frustucke while the s/o stayed in bed resting sore feet of the day before. Thoughtfully, I grabbed my egg from it's cup to take up to him so he could have a li'l something to eat. I'll never forget the look my waitress gave me("now there's a dumbass American," or something along those lines, I imagine) as I slipped the egg into my pocket. Well, duh...I'd forgotten that Germans tend to like their eggs soft-boiled in the morning. It made it back to the room safely, but when I went to peel it...shploosh!
Being gauche rocks, stun the bourgeoisie