A reduction of salt in your diet will not reduce hypertension at all.

Salt - as we tend to use the term, the regular tablesalt (sodium chloride) in its pure form is not what the body needs and too much of anything is toxic.

If you like salt on your food stop using the refined ones and instead use the unrefined variety which can contain another 80 or so of other minerals that is "beneficial" to the body.

and here is just one article of thousands on the topic:
http://www.jacn.org/cgi/content/abstract/25/suppl_3/247S

what it actually boils down to is whether you are sensitive to salt or not and the reasons to why a person is sensitive or not, that is the interesting part.