This peice of information looks more like PR exercise, USA has also shared 'Highly classified' data on Iraq's WMDs which were never found.
Authenticity of US data is questionable in US, so there is no reason to use it for making decisions for India.
In this context it should not be forgotten, that India has in the past several times shared 'classified' data on Pakistan's suport for terreroist, but USA still suports(Funds) pakistans military establishment.
A nuclear Iran will never be a bigger threat to india, or to the world than a nuclear Pakistan.
India's vote against Iran was a blunder that will take time to mend. Mr. Manmohansingh has the brightest brains and more degrees than any previous primeminister, but he needs to strengthen his spinal cord.