Jamie Goode, writing on the Wiseman study, which numerous media reports claim showed that average people can't tell expensive wine from cheap wine:

"There is a single, crucial detail that is absent from these reports. It was not a comparison between two wines, one cheap and one expensive. Instead, subjects were given just a single wine to taste, and then asked to say whether it was cheap or expensive."

Even though it's not recent, it's a good write-up of another misconception that's been cemented into 'common knowledge'. A good, thorough read.