No I'd say he'd HAVE to be a Doctor, why would he lie about an academic achievement particularly one where the Thing would be the first to point out to him if he weren't?
I see him much more along the lines of Fthe 1932 movie where Boris Karloff's Fu Manchu introduces himself to the other characters.
"I am a doctor of philosophy from Edinburgh, I am a doctor of law from Christ College, I am a doctor of medicine from Harvard. My friends, out of courtesy, call me doctor. "
He's just proven he's got more qualifications than the rest of the cast put together, so it's the self deprecating, "out of courtesy" that gets me every time. :)