No, my guess is that less than 1 in a 100 submissions is approved. Your site should really be better or offer something unique to the other listings in the category.
The Dmoz is the popular Google's directory. It approves only unique quality content websites which follows the DMOZ guidelines. By following the guidelines of DMOZ will surely approves your site. Refer the DMOZ guidelines here ODP Guideliness .
Not many people actually use DMOZ for searches in the same way that Yahoo! is used, so the directory itself is of little value in generating traffic.