It seems that way. It was ingrained in me -- probably through pop culture more than anything -- that scientists treat things with skepticism. I don't see this happening with evolution. How do we empirically know that a housecat and donkey have a common descendent? I mentioned this to RWN earlier. I'm curious as to his answer.
I don't think they have found any bones which they could even remotely 'use' to link most of the mammal genera (which being the most recent, should be the easiest to find). If one looks at the 'ancestors' in the evolutionary trees, for most species they have 'proto' this or 'archaic' that which means they don't know beans what came before.