I wouldn't call that a gold standard; I'd call it currency freedom. A gold standard is when a government coercively decrees how gold must and must not be used.
Yes, that's the sense in which I meant it, i.e., not a government imposed standard, but one chosen by the market by merely lifting legal barriers to using gold and silver as money. Essentially, a return to the system of "free coinage." An improvement to that system, however, would be the elimination of the practice of assigning a value to the coins, but rather only a weight and purity.
