Until very recently I completly agreed, but I've been using Silver Efex Pro for a couple of weeks, and that's given me results that I'm very much happier with than conversions done inside Lightroom. I don't think the results are exactly the same as film, but conversions from M9 DNG files look sufficiently good that I no longer feel I have to have a film camera with me to shoot decent B&W. Partly it's because it uses terminiology that I'm familiar with "make it look more like Tri-X", "add a red filter", but even when it's not aping film it still somehow looks better than a stright Lightroom B&W conversion.