I don't think anyone will say that Nash was made into an all-star by D'Antoni's system because Steve has clearly always been a very good player. With that said, I don't see how this article proves that Nash can be great with D'Antoni's system.
I think the premise of this article is entirely off base. It claims that Nash has been validated but fails to bring up that Nash's success this year is in large part due to the Suns reinstating D'Antoni's offensive schemes (Gentry has said time and time again that they are doing a lot of the stuff that Mike did).
Last season, Nash did not look as good under Porter and when Gentry took over, Nash started to get back to what he was under D'Antoni. So if Nash was great with D'Antoni's system before Porter, very good under Porter, and then great again after Porter with D'Antoni's offense back in place, what is the common derivative there for Nash being great?
D'Antoni's system was perfect for Nash's talents just like Nash was the perfect quarterback for D'Antoni's system. I don't see how you can take away from either part as the success the Suns have been having over the past decade is in large part due to both of those pieces.
"This is a very cautious situation that we're in. You have to be conservative in terms of using your assets and using them wisely. We're building for the future." - Zeke (I guess not protecting a first round pick is being conservative)