Remember that only 40% of the mass of salt is sodium. The amount of sodium in these recipes is about 3g salt, or 1200mg sodium per 2000 cal.
Most nutritional and medical associations have lowered their recommendations to 1500 mg sodium/day.
I don't recommend lowering sodium below what is in these recipes: two major studies have shown that there is a sweet spot in sodium intake at around 3000 mg sodium (7-8 g of salt) per day. There is increased disease at both high and low sodium intake. I think it right that the study of disease be the final judgement on sodium intake.