Here is link to a slo-mo swing video of Tiger Woods's swing, and you will be able to study the movement of the back of his left hand and clubface during the release swivel action.
This photo comparison shows that both Tiger and Ben had the back of their left hand facing slightly groundwards at this stage of the release swivel action (when viewed from a similar off-center camera angle) and that the clubface is not square yet to the swingarc.
I believe that the clubface must always approach the ball slightly open at the time of first ball impact in standard shots.
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