After reading through the whole thread.. I'm not sure he's saying that unbiased renderers are inferior.. i think it's more a case of comparing the effects of two different technologies.  At least that's my take on it.  I usually love diving into threads like this and putty in my 2 cents; but, there's just no arguing with Linux users.  They're second only to Mac users ~hides from Paolo~ in their air of superiority.