True enough. But isn't prejudice ultimately about warped values rather than mistaken facts? It is easier to talk about facts, but then people tend to discount facts that don't suit their values. Being upset by reality is probably a good sign.

But I fear, what with confirmation bias and everything, that so many widespread preconceptions about "average" members of one sex, race, religion or another, are as unshakeable as they are unspeakable, studies or no. So I wonder if it might be better to beat into people's heads the point that nobody is an average member of anything.