It's probably reasonable to say that there are more historical
instances of B's address being hard-coded than there are for Eric's
authority server, though (and I'm guessing that he also doesn't have
to answer priming queries :-)
currently in the middle of such a safe, conservative
transition leads me to believe that there will -NEVER-
be a point w/ there are no queries to the old address.
(he says, 24 months into a transition...)