Interesting if true, but I'm not sure how far we can trust Sanger's research; which according to a related New York Times story is all based on sources that refuse to be identified:

"This account of the American and Israeli effort to undermine the Iranian nuclear program is based on interviews over the past 18 months with current and former American, European and Israeli officials involved in the program, as well as a range of outside experts. None would allow their names to be used because the effort remains highly classified, and parts of it continue to this day."

You really have to wonder why American, Israeli, and European sources all developed loose lips on the subject for Mr. Sanger. I'm not sure I buy it.

All the same, I doubt that anyone would argue that the scenario proposed in the book is unlikely.