Thanks for the update. Interesting to see the detailed info on a number of the wineries. I note you drank a lot of reds but did you try any Torrontes, another grape synonymous with Argentina (though the best examples generally come from around Salta)? It's very distinctive and worth a try, I think. Shame about the lax service you experienced in so many places, which unfortunately seems to be fairly common in Argentina. I generally found service levels much higher in Chile and Uruguay than in Argentina.
Back to Uruguay for a moment, you described tannat as 'a grape that only a mother could love'. Why do you say that? Clearly you know a lot about wine, and each to their own, but I'd love to hear why you say that, and also whether there were any examples you did enjoy?