I'll post my answer later, but to be clear, I'm talking about:
Full swing mechanics type shots. This doesn't mean "short game shots" or putts. Tee shots and approaches outside of about 70 yards, as well as those second shots on par fives.
By "pure" I don't mean absolutely pure, but I do mean shots where you can't really tell if you hit it a little funny (toward the toe, a half a groove thin, etc.).
Directionality counts. If you hit one absolutely flush but the face was 10° open and the ball sails 30 yards right… that's not a "pure shot".