Excessively great expectations?
Methinks hoping for chemical analysis from interpretation of RADAR data obtained from orbit might be a tad... optimistic?
Obviously it would be nice to know what it could be contaminated with but discoveries like this - actual, real, quantitative data, that we didn't all know already and not just whimsical press-orientated speculation is greatly appreciated by this commentard. Pint of purest Eau de Mars raised to the boffs --------->
As for the contaminants, I imagine a simple solar still would work extremely efficiently in the Martian environment... so rogue minerals shouldn't pose too much of a problem...