Instinctive shooting can be a controversial topic. Go to
www.stickbow.com and hang out at the leatherwall forum and you will see what I mean. There are a couple of guys there, namely Brian Sorrels and Viper who have written books on the subject.
I have to agree with Runsalone as far as anchoring. I was taught the same way. Always anchor to the same point each time you shoot. I often practice with AH's approach and start at 10 yards and then move back. One of my archery coaches had me do an exercise, shooting at various distances from 5 yds. to 20 yds. It is very helpful.
When I teach instinctive archery, I use the same analogy that AH used, just like throwing a ball.