The only reason why this seems like more than due diligence on Griffin's part is because Griffin has a history of building a championship team around a Rich Paul client (Lebron) in a small market city. I think that makes Griffin's argument for Davis staying legitimate.
However, I think the die is cast in this situation. Davis is looking for a win-now situation and high visibility. New Orleans is making the right moves to build a contender, but it isn't going to happen overnight, especially in the west.