SD ASKED: "Wouldn't counterclockwise rotation (from the golfer's perspective) close the clubface?"
RESPONSE: I think yes, at least close it enough to square it at impact.
I was referring to the backswing, not the downswing. About his takeaway (early part of backswing) Blake wrote:
"As the left hand pushes the club straight back, the action of keeping the clubface square to the line of flight causes the left hand to turn anti-clockwise, with the left thumb moving up and over."
Turning the left hand anti-clockwise in the early part of the backswing would tend to close the clubface (Blake said keep it square). Do you believe that he got this wrong, ie, that his left hand was NOT, in fact, turning anti-clockwise (from the golfer's perspective)? If he opened the clubface in the backswing, rather than closed it, that would mean his perception of what the clubface was doing was exactly backwards. Jim