Agreed, the days of Google updating their directory monthly are long gone. Think it's as frequently as quarterly?
i got the impression they don't pay too much attention to it when i saw the "2005" copyright notice at the bottom
Dmoz hasn't added any new sites since last September/October so no new sites have been added to Google since before that.
They have worked very hard to improve the efficacy of their duplicate content filters. I suspect the answer to your question is "no".