The thing to remember is that black and white photography requires completely different techniques.
You can't just take a color photo and convert it to grayscale...
I remember watching a programme on Channel 4 in the UK about the 100 best ever adverts. One of which was a modern advert for beer which was filmed in black and white. Chas and Dave did the song for it. Anyway, the point is, apparently they got a dude who worked on the British classic movie 'The Third Man' to do the lighting. However, the director thought it looked awful, shadows everywhere. But, once it had been filmed, the director had to concede that it looked amazing. Similar thing I think. The lighting for black and white photography is totally different (I imagine) to that of colour photography.