The Stack Overflow close queue is at 68K question, and some questions voted for closure reach reviewers sometimes 6-10 hours after being posted. I don't actually know how long since the first flag/close vote. Anyway, they get answers before they get closed.
When going through the review queue I see questions with close votes that have accepted answers, sometimes upvoted questions, sometimes upvoted accepted answers. In some cases my feeling is to not close them because they generated a good answer and the OP's answer was found so he doesn't need to reedit the question to be more clear.
So: In case of questions in the review queue, for closing with an accepted (maybe upvoted) answer, what is expected of me? To vote to "close" the question because it was unclear/duplicate? Vote to "leave open"? Or edit it according to the accepted answer and vote leave open?