Was Iran's August 22 Announcement Date Premature?

At least one outlet is reporting that Iran may be on the verge of announcing a "nuclear breakthrough."  

If this is true, it would perhaps explain the drama created by Iranian President Mahmoud Ahmadinejad when he declared that Iran would give its response on August 22 to the incentive package offered by the international community.  Selecting an earlier date than that set by the international community coupled with the fact that the date also possessed religious significance to Shiite Muslims created a certain degree of anticipation for some kind of big announcement.  This anticipation quickly fizzled upon the curious declaration on the 22nd that Iran would like to begin serious negotiations over its nuclear program. 

Just speculation on my part, but I wonder if the anticipated August 22 announcement was canned for lack of readiness which would also explain the bizarre (non)announcement that Iran was ready to engage in "serious negotiations."  The regime may have just been looking to buy some time.

H/T Regime Change Iran