Possible Duplicate:
Inconsistent line spacing
Why is this text distribution unbalanced? As you can see, there is more space between the first line and the second, than between the second and the third.
\documentclass{memoir}
\usepackage{xltxtra}
\defaultfontfeatures{Ligatures=TeX, Scale=MatchLowercase}
\setmainfont{Minion Pro}
\begin{document}
\hbox{}\vfill
{
\parindent=0pt
\LARGE\scshape
First Sentence\\
Second Sentence\
Third Sentence\\
}
\vfill
\end{document}

\\, but you do need an empty line before the closing brace. Instead of\hbox{}\vfillprefer\vspace*{\fill}– egreg Jan 24 '13 at 00:13\vspace*{\fill}preferable to\hbox{}\vfill? – NVaughan Jan 24 '13 at 15:58