I have heard about his recommendation and it's probably based on the way he recommends you fish it. Also, maybe his jigs hook up better for some reason when you set it straight up.

I don't use his jigs, fish them where and the way he recommends. I could see where physics and the caming action of the small hook would be optimized when you sweep upward....looks good on paper. I'm just telling you from fishing this thing for the last 10+ years with and without his system, I've had better success just gently applying pressure at the exact 180˚ angle the fish takes it down....sometimes that is straight up, but most times it's not. Plus, the fish I catch on it aren't typically on bluff walls and I use it as more of a follow up bait anyway so what do I really know....lol.

I think that boat position has more to do with catching fish on the fly than anything...my opinion...good luck.