So are they saying ISRO are the 'Sources in Bangalore', or someone else? It's all a bit vague.
Oh, and something else they totally (and conveniently) 'forgot' to mention in that article - the instrument on Chandrayaan-1 that detected water - who was that designed and built by again? Er, NASA, actually.
As for NASA 'knowing for decades', well that's bunk too. NASA simply had insufficient evidence. Probes that leave Earth carry an abundance of water with them (i.e. condensate) - it's a fact of life. So if a probe detects a water signature, is that the water that the probe carried with it, or extraterrestrial water? Same problem in reverse with the Apollo samples - there was a film of water on them, but was that water there all along or was it condensate from onboard the spacecraft?
The evidence that NASA did have lead them to believe it was dry. Obviously, that depends where you look. For example, Apollo couldn't reach the lunar poles, where most of the water is thought to be.
Oh, and it's all rather relative too - the amounts of water we're talking about here is in the order of one drinks bottle per tonne of regolith, maybe less (my memory is a bit vague on this so someone else feel free to correct me). That's less than you'll find in most deserts here on Earth. Hardly a pond then, let alone an ocean.
/random rambling.