# Why does \author respond differently to \hfill than do \date and \title in \maketitle?

This question asks how to align titlepage elements to the right. I was trying out a possible an answer to it when to my surprise, my solution almost worked. (I was expecting success or abject failure.) The code

document\documentclass[notitlepage]{article}
\title{\hfill{}Title}
\author{\hfill{}Author}
\date{\hfill{}Date}

\begin{document}
\maketitle
\end{document}


sets the title and date flush right as I'd hoped. However, 'Author' is set centred, as though I'd not put in the \hfill at all. This surprised me---I'd have expected my idea to work for all three fields of the title page or none.

Why does \author behave differently in conjunction with \hfill in \maketitle than do \title and \date?

-