"With casting, there often seems to be an assumption of whiteness, if you will. That is, even if there is nothing in the script, nor no historical context for the character to be white the default will be to assume the character must be white."
Not in the casting notices I'm seeing. Yes, there are those that call for a specific ethnicity, but there are so many now that have "Any Ethnicity" next to the character...even for Toulouse Lautrec in "My Paris."