I really think the right way to look at this is as a matter of degree ('what is it conscious of) rather than whether it is conscious or not. The crux: if the capacity exists in all material but "something else" makes it conscious, then consciousness is outside of the material, right?
The argument that consciousness suddenly arises due to a particular configuration of atoms is also suspect; all forms of consciousness we routinely accept are fairly robust to many configuration changes. It seems to me that consciousness hinges on the discussion of degree or content, not on the material form. A soup of atoms certainly could be aware, but not aware of in the same way that "I" am aware.
The argument that consciousness suddenly arises due to a particular configuration of atoms is also suspect; all forms of consciousness we routinely accept are fairly robust to many configuration changes. It seems to me that consciousness hinges on the discussion of degree or content, not on the material form. A soup of atoms certainly could be aware, but not aware of in the same way that "I" am aware.