User blog comment:Lia Schiffer/396: The Bite/@comment-1706259-20100322230329

Either way Lia; Aizen controls the flow of the manga! ;)

Also; I disagree; If you remember correctly; someone who has gained Bankai can activate there shikai at will; whose to say that Aizen didnt wordlessly activate it when he was fighting Ichigo (after the Genryusai ordeal).. its not a crack theory if you think about it.