I love the technique and will for sure use it.

I don't think I like how he tied the fly though. If he started at the back of the fly (hooks bend) and worked forward, it wouldn't look that heavy with thread and I would have finished the fly with half hitches.

After AllanB posted about how the Stewart Black Spider is tied I looked it up and came across one of my favorite fly tiers Davie McPhail and these two flies.

http://www.youtube.com/watch?v=uV7k3epJfJY

Again I love the technique and have used it for peacock hurl but never thought to use it for hackle.

Great post and rebuttals.