Originally Posted by pnearn

What do you mean by "cock and swing"? Are you doing anything conciously with your wrists? If so be careful there as what you are doing by just turning your shoulders and doing nothing with your arms and hands is letting the club go back perfectly on your shoulder plane. If you think dead arms and hands your wrists will set naturally as you turn.

This is why you are hitting the ball so well as you are making a full shoulder turn (not a "fake" turn one would make when only using the arms/hands). When you swing down from there it is far easier to hit the ball. Less moving parts, less need for timing, booom!