This is both quite impressive in terms of non-superpower nuclear diplomacy but likewise self-serving--especially to Turkey.
What New Core powers like Turkey and Brazil say with this deal: We ourselves can and will decide, under what circumstances we'll collectively self-engineer ourselves--and other rising regional powers like us--into nuclear status.
In other words, the Old Core, old-boy nuclear powers club no longer decides.
Bold, slick moves by both Lula and Erdogan that will provide Ahmadinejad just enough cover to claim victory--and keep us guessing--while effectively killing any movement toward tougher sanctions. The Chinese have to like it, as will Moscow--I imagine.
Have to give it up to Iran on this one, as well as Turkey and Brazil. This deal constitutes a real rule-set reset when it comes to issues of proliferation--both real and stealthy. The West simply no longer dictates on this issue.
End of the world to some, but just another aspect of rising great powers incorporating themselves into the venues of international power and influence instead of waiting for the established powers to invite them in--on the West's preferred terms.
Whether or not Iran will truly be satisfied with a Japan-like outcome (obviously capable and close to weaponization but not taking the final step) is yet to be seen, but this deal is an effective short-term defusing of any logic of attack. Now, Israel is pre-approved to be widely condemned for any kinetics by the bulk of the world's rising great powers.
Assuming it holds, it looks like the latest "check" to me, meaning a move that keeps Tehran close to its endgame win and essentially determining our next, checkmate-avoiding move. Iran's declaration that it will continue to enrich some fuel on its own? That's just an in-your-face reminder.
Will it be enough for the West? Absolutely not. But it gives China and India the out they need.
The big point: Iran keeps coming up with these clever ways to buy time, and in doing so, it's attracting a lot of implicit support from rising New Core powers who aren't exactly in favor of Iran's nuclear status but will defend its right to do so--however quietly and cleverly.