Zsh use's zle(Z-Shell Line Editor), which is different then libreadline as its part of the shell not a separate library. Zle's behavior is editable through your .zshrc.

Maybe I dumbed the post down too much, was just listing a few features that I use every day that IMO work better then the comparable Bash features.

I read and enjoyed the article and I am surprised it has recieved this level of criticism here.

Perhaps you should update it and add a number of the other features that you like about it (with a brief description..)?

(edit: spelling)