Originally Posted by BevelDevil
As I said in my post above, the Delpo stroke can be used as a transition from a conventional double-bend to a Federer forehand. While using the Delpo stroke, a person can get accustomed to hitting with a straight arm. Then, if he so chooses, he can begin incorporating increasing degrees of pronation on the backswing to eventually arrive at a Federer forehand. Or he can stick with the Delpo forehand.
Imo, I think it'd be a better idea to reverse the steps. First start pronating with a double bend, and then add the straight arm by just moving your contact forward.
Also, I'd like to add that grip plays into this. I personally hit with the straight arm and I don't see how it would work with anything more extreme than a SW grip. Personally, I use an extreme-eastern.