The Iranians are said to be considering a counter-proposal to our proffered deal. Unfortunately, unlike the deal already on the table, we know nothing of the contents of the counter-offer the Iranians are contemplating. I expect that murkiness to disperse quickly if they actually deliver a counter-offer. Just try keeping it secret, State Department. I dare you.
Still, this looks like real diplomacy to me. This is just the Iranians doing all the jostling for position they can before the actual event. This will work. War will be avoided... And Iran will have a full fuel cycle on their soil, with all the concomitant expertise that implies. That's clearly a victory, because war would be a catastrophe - but it's definitely victory with a small "v."