The combativeness on the blog is unproductive, but I left a few comments anyways.
I don't really disagree with your claims, although I think you have to read the full Wealth of Nations in order to appreciate Adam Smith's theory of money. For instance, you are quoting from book 1 chapter 4, but Smith also has a very interesting (and much more extensive) chapter describing the complex workings of the system of bills of exchange, so he was by no means focused on gold and silver as money (See book 2 chapter 2). In this way he was different from Menger, who never discusses credit. Like Henry Dunning Macleod (who I see someone has already quoted), Smith was comfortable with credit as money.
The existence of Henry Dunning Macleod, as well as George Berkeley and James Steuart, disconfirms the thesis that classical and neo-classical economists were uniformly metallists. All advocated to various degrees a credit theory of money. Jevons credits Macleod for laying the framework for marginal utility calculus, so he was surely neoclassical.
The "origins of money" debate is interesting but I don't know how important it is. I think it's perfectly logical to adopt a Mengerian metallist approach and a Macleodean credit approach, modifying each just enough so that they can be amalgamated. Let the anthropologists take care of the chronological order of things.On Mises:
But there is a severe flaw underlying Mises’s whole intellectual program in producing his Regression Theorem: the truth of the assumption that money only has indirect utility.... The view that money only has utility through its exchange value is also held by neoclassicals... This idea held by Austrians and neoclassicals should be rejected."
I think you'll find that a number of Austrians already reject this. William Hutt's paper on the Yield from Money Held is a good example.
There are plenty of problems with Hoppe's article, but it is a good example of what I am talking about. Hutt was a fellow traveler of the Austrians and his paper is very popular in Austrian circles.
See an earlier post on Menger and the origins of money.