It's either a lot of water or some sign of life or both. crosses fingers
I suspect it's some sort of sign of complex organics, which would be a strong sign of past life.
Big news for scientists may end up being unnoticeable small developments to the general public. Earthshaking may be key here, like an organic compound unexpected there.
While finding complex materials would be earth shattering, the threshold of accepting a martian source for a reading like is much higher than it would be for accepting the same for organic findings.
Or could be a scientific whiff. Looks like they're keeping their mouths shut until they can scientifically confirm the data.