Hmm, I believe this result. But I'll bet it can be related to other factors as well.
When I have a glass of a familiar "table" wine I typically drink without giving much thought to its attributes. The other night, at dinner, a friend offered some homemade Merlot (price not mentioned). When I took the first few sips all senses were on alert. It turned out to be a very good drink......or maybe it wasn't as good as I thought.