So are people putting this down because Wal-Mart is involved , or because of the price range?

While I was in college I took a wine tasting course - one of the things they taught us was that the price had little to do with the QUALITY of the wine.** In fact, though we didn't do true "blind" tasting - for several of the tasting sessions the Teaching Assistants and Professor SWAPPED bottles around on us. A number of people consistantly ranked the wines by "name"-label and cost. Those of us who actually ranked the wines by taste and preference ended up with much higher grades - even where the prof and TA's didn't AGREE with our choices. (they kept the results and analyzed them for patterns based on label, based on price, and based on their own judgements of the wine.)

**in the long run. In other words - there is no guarantee that a high price or "big-name" label will result in a quality wine - and frequently they can be mediocre. However a low price wine can and frequently is quite good. Furthermore - lower priced wines tend to appeal to broader selections of population.