The difference in pinot noir and say, cabernet sauv is like night and day, so I'm not sure what you're talking about.
> Most people can't tell a red from a white by taste.
I most certainly can!
But I do agree, sometimes it's hard to judge the cheap wine vs the expensive ones, but we're talking $25 bottle to a $40 bottle. I don't have a lot of difficulty picking out the $8 vs the $25 from purely anecdotal experience. I am determined to double-blind myself at some point though.