verticle center with CSS Tables

Hello expert,

Working on vertically aligning some text in a CSS <div>.
I found a site that claims to provide a solution using
CSS tables.

http://www.vanseodesign.com/css/vertical-centering/

 <div style="display: table; background: yellow;">
 <div style="display: table-cell; background: blue; color: white; height:62px; width: 162px; vertical-align: middle;">
 some text text text</div>

But this does not vertically center the text.

Am I doing something wrong.

Thanks.

Allen in Dallas