The OP is a classic case of wishful thinking clogging up what has actually been said. So you tell us you cannot name the Branch Overseer. Why not? What's wrong with the country being identified? If what you say is correct - and you did hear accurately, JWs will also be talking about the talk and even contacting the branch office.
Isn't it funny that when posters come up with these sorts of exaggerated and amazing stories they cannot say who gave the talk or where the talk was given?