Nope.
So, I am saying almost 5x the recommended limit for a month might not generalize very well. Sorry, 'Nope' is not going to cut it. Further, the human body climatizes to various situations over time suck as heat or altitude, I suspect salt intake is probably good example of that.
The US daily recommended sodium intake is 1.5-2.3g. The sodium component of sodium chloride is about 40%, so that's more like 3.75-5.75g of salt per day. Still lower than the study, but putting the higher recommended amount right around the lower study amount.
(I consume up to an extra teaspoon of salt each day to make sure I'm getting at least 5000mg of sodium so I don't start passing out at an inconvenient moment, on advice of a cardiologist)
These are supposed to be limits not minimum recommendations. Also people get sodium from more than just salt so 5.75g of salt is still high and calling 6g low is kind of a misnomer.