I first starting doing this (missing the ding) when playing heavy wind. Same idea as the missing the ding putting method on breaking putts.
Now I am trying it on all iron shots and it seems to be getting me closer to the hole.
I simply aim right and miss the ding left. Or vice versa. It takes the right side of the golf course out of play. My draw / pull miss works the ball toward the hole. Now it is just a matter of judging how much.
For me, taking dead aim and trying to ding shots isn't the percentage play. After all, it is a game of misses, so why not just allow for your tendency?
I have not noticed any drastic loss of distance or spin doing this. I use R11s and a Nike ball.
I welcome your comments.