I will give you the more cupped at address. I have a strong left hand and have been fooling with shaft lean and set up to see what's more comfortable and useful. Cupped or forcing my left wrist straight at set up. However, I am pretty sure I don't cup my left wrist at the top of my swing. I go back pretty shallow and by the top my right wrist is cupped and my left wrist goes the other way. So maybe it's more of grip/swing plane combo that is causing it? Or maybe not related at all to the grip just not allowing the right wrist to go back.
And to the OP about the push just close your club face some. Voila, draw.
That hasn't been my experience.
I've seen the opposite more, as a strong grip that's bowed will be even more shut at the top of the backswing. A strong grip is naturally more cupped than arched at setup as well.
I encourage individual diagnoses on these types of things. Some players feel the grip is strong and the face a little "shut" so they cup their wrist to help keep the face open a bit (Fred Couples - strong grip, cupped at impact and top of the backswing), others let it arch (Dustin Johnson, not that his grip is particularly strong).
Also is the one on the right really cupped? It looks like his left hand is turned and it might just be the camera angle that is making it looked cupped when it's actually bent to the thumb side. Sorry I don't know the lingo for that.
Or a pull
Okay I can kind of see it a little better in that one. Still hard though. So are you guys saying that is caused by a strong grip? I would think what looks like a steep plane and flying elbow would be causing that but I am not a pro obviously.
I would say the extra cup at address is caused by the strong left hand. With the top of the backswing, it depends on how the player "senses" the club face, like Erik said. Freddy keeps the cup in there while someone like Duval lets it bow. The position of the right hand (pad of the trigger finger) also has to be considered, if it's more "under" the grip, I think you'll see more of a bowed look of the left wrist/shut face at A4.