^ People sometimes purchase games they don't enjoy. Does that mean those consumers aren't savy? If it is even possible for a consumer to not be savy then it puts a slight hole in your argument that sales and quality ALWAYS go together.
Sales are the best indication we have that are quantifiable, but it's possible that they don't always correlate with quality(Otherwise a used market wouldn't exist period and rentals wouldn't be needed if consumers were always savy). We don't assume that Wal-Mart has the best quality products because they sell more than anyone else, or that Macs are very low quality because they sell a lot less than PCs and I don't see why it's any different with games. Quality is a very subjective term and depends heavily upon different users and consumers and their demands and expectations.
