There is one way submitters can possibly (though no guarantees) expedite the listing of their site that is completely legitimate and above board. Follow the guidelines to the letter. I mean:
a) select the right category, the one the site belongs in not the one that would be best for marketing purposes.
b) Write a title exactly according to the guidelines.
c) Write a description that is exactly compliant with the guidelines - no hype, no keyword stuffing, no unnecessary repetition, no advertising copy.
d) Submit one site only, no mirrors, no fraternal mirrors, no doorways, no nothing but the original principal site.
e) If you restrict areas of the site to registered users provide a guest login and password for the editor within the description in [square brackets]
f) Do not resubmit the site unless an editor says it is OK to do so.
When editors go to review a list of possible suggestions, those that are easy to list because they require minimal work and it is clear the submitter has taken great care to read, understand, and obey the guidelines, might, just might, gain the attention of the editor. If they find it a pleasure to add your site, if they enjoy the experience of editing in that category, who knows what productivity increases that might prompt.
Spread the word!