Well, I can't continue to argue with you guys because you have a delusional fallback to refute everything I say.
I will just leave you with this.
I think we can all agree that the hips do turn less than the shoulders during the golf swing. And that the golf swing is about consistency so we want to turn the hips and shoulders back the same respective amount on every swing (of equal shot distance). If that is the case then what would be the more repeatable way to accomplish a shoulder and hip turn:
1) Turn your hips and shoulders back at the same time and then stop turning your hips at the same spot every time but continue turning your shoulders until you have a full shoulder turn
2) Turn your shoulders back and let them start turning the hips (which they will start doing at the same point every time). Keep turning your shoulders back to a full turn. The hips will continue to rotate with the shoulders but because they started rotating later than the shoulders they will have rotated less than the shoulders. BUT, because you just let it happen they will always rotate the same amount every time. Automatic synchronization.
And Iacas, regarding your students not 'getting it'. It almost always has to do with setup. If the hips aren't rotating and allowing the right leg to straighten they are usually either lacking secondary spine tilt, sufficient knee flex or are too tense in the hip region.