When asked about Thad's transition from the 4 to the 3, it became clear that this could be the critical question of the season. Stefanski said Thad has been working hard all Summer on his handle and the plan right now is for him to play the bulk of his minutes at the three. Later he said definitively that as of now, Iguodala is the starting two guard. The only question is how well Thad will transition.
And in a related bit:
The roster is set, and Willie will be a part of the rotation. How big of a part he plays will depend largely on Thad's development. If he can handle the three, we won't see a whole lot of Willie. If he can't, well that's not a road we want to go down at this point. Moving Iguodala back to the three for most of his minutes would be a huge blow to the step forward this team has taken. There's a very good chance Green could find himself in the starting lineup again. That's not something anyone wants to see happen.