Here's a Stack and Tilt write-up from PGATour.com. His discussion of spine tilting confused me. FTA:
Although these two components seem to promote a more consistent club head strike in front of the golf ball, it seems it makes it more difficult to control ball flight as the clubs get longer. What's important to understand is not only does the club head need to be moving "down," it also needs to be moving "out" and "forward". These three directions define the geometry of the downswing plane of motion and you need to take them all into consideration when you decide how to use your body. With that said, at the TOUR Academies, we like to see less spine tilt away from the target with the weight slightly towards the target at address/backswing with the shorter shots. However, as the clubs get longer and lose loft, some tilt away from the target and leveling of the weight is highly recommended to help assure the proper launch conditions as well as face and path control.
Tilted toward the target at address? Tilted away from the target at address? Tilted toward the target at the top of the backswing?
I've never heard of tilting toward or away from the target before. My understanding of S&T is that the tilt comes from rotating the torso and hips, while keeping the center of the shoulders and center of the hips in the same position. Thus you start "tilted" forward at a 90* angle to the target line from your chest, then you end tilted at that same spot because you just rotated on an imaginary line through your initial spine position. Your shoulders may not be rotated fully 90*, but even if they're slanted toward the target you're still tilted straight at that same spot, which is not toward the target.
What does the other so-called "conventional" swing teach about tilting that distinguishes it from S&T in this area? Does the hip sway/loading on the right foot cause the hips to move right more than the shoulders, causing that imaginary spine line to slightly tilt toward the target? Is that what the author means?