I've already up voted you, but have to praise this insight. Folksonomy is a wonderful navigation and subscription method for the early adopters, but I still hear my wife telling my son to "search for a recipe you like on Pinterest". It's perhaps the Yahoo! vs. Google aesthetic in the sense that Delicious appealed to curators who were comfortable navigating by concepts, while the rest of the world just wants to find a like-minded, curated world that they can navigate by search.