Just wondering.... I Holland we have a few directories that are pritty large (2 million visitors a day) and bring in traffic. I tend to think that most directories out there are for seo purpose fine but not for traffic. Which are the real directories / startpages that are actually used by people?
If your directories get that many vistors a day why did you not post it. To answer you guestion I think the yahoo directory and dmoz get the most, but I'm not really sure.
It really depends on the category that you are listed in, I have a couple of listings in big directories that bring no traffic at all and others at small directories that bring a bit of traffic. Regional directories send traffic because people tend to use them as search engines to find sites from their country.
We have a worldwide directory that has been online since 2000 yet 70% of our traffic still comes from USA .................. and the site is used daily 365/24/7 by people who want info from the site ................ and it is very well used by many 1,000's of people