I think Winick has more or less said it all, but I'll repeat the (for me) most important point: Not having a (classically or whatever) trained voice is not the same as being unable to sing. Therefore I cannot accept Challis' statement even with the qualifications. I suppose there are people who cannot sing - they hit the wrong notes, can't sustain them, lack rhythm etc even when singing God Save the Queen. But that's not what we're talking about here. We're talking particular tastes and cultures, as Winick has already pointed out. - Enough said!