http://www.sciencedaily.com/releases/2011/05/110526141400.htmUmm, sample size? Can you really extrapolate to such a large mass of water from just this?
Is there water on the moon? I think so. This much? I don't know, but I am skeptical of such claims to a vast quantity.
The earth is 3.7 times larger than the moon. I would think most people would agree that we are a water-rich planet by any standard.
To say that the moon has as much water as the earth seems to defy logic. Of course their language "in some places it rivals the amount of water found within Earth" is sensationalistic. Not a well written article in that regard from a scientific perspective IMO!