Why Do Authors Make Readers Wait?

One of the rules--proved upon the soiled reputations of authors who have dared break it--is that authors should never respond to reviews. This is good advice, and I've never strayed.



Until now.



In an Amazon review, one person commented:



The only thing I hate about this series is that since they have all already "been written" according to the author, why am I waiting? I think that is nothing but cruelty.



Ouch.



If there are readers out there who indeed imagine that I have the entire serie...