It makes enough sense to me that I could almost believe it was intended, but let's face it, if the Doctor HAD been brain-snatched, Moffat would not have been able to resist being all "WOOOO WHAT'S WRONG WITH THE DOCTOR? IT'S A MYSTERYYYYY WOOOOO WHAT COULD IT BEEEEEEEE?"

Yes! And he played Islington in "Neverwhere"!