I've been using the cold salt water, bring to a boil, turn off and let sit, for 18 minutes....I've never had a problem peeling them, but I did notice, oftentimes, the yolk is completely to one side of the egg.
With the boiling water method, I think the white sets, quickly, thus, avoiding this, and makes for a better looking deviled egg...Plus, the yolk is bright yellow...No gray..Again, for the same reason.
As for the blowing the egg out of the shell, it's too much fun..I know some people would frown on it, if they were serving the eggs to the public, but for personal use, it's quicker than peeling, and a kick in the pants, to boot.