The below pic from the SnT book shows that the side of his hips are over his ankles. As stated before, a very easy way to check is to hold a club on the side of the hip to see if the club head dangles next to the ankle. The only way get the club next to the ankle is to be in the below position, or knees slightly bent combined with a moderate upper body tilt.
For folks who are more bent over, it will feel like you're standing much taller to the ball. You may also feel like you're more looking down your nose at the ball. This address position allows for much more shoulder rotation because he's standing taller to the ball. I see a LOT of guys struggle with shoulder rotation because they are too bent over with straight knees at address.
@GolfLivesMatter. Thanks for the awesome info.
Yes. And we also don't want to stick our butt out and create that arch in the lower spine - as you may have been erroneously taught in shift & lift instruction - as this will greatly limit and flatten the hip and shoulder turn, while also placing unnecessary stress on the body. Instead, just simply move your butt outward slightly in your setup like Mike Bennett in the above photo, as if you were going to sit down in a chair. You can easily compare the two positions - arched vs. flat - to see just how much this affects your ability to rotate your hips and shoulders.