If you had read the other posts here you'd have found that there is no 'average time' or timetable. Sites get reviewed when they get reviewed. Even if we technically could put up a post for each category (we can't) it would be meaningless.
This board is only a year old, and it is here to help advise *if* a site is in the queue. Before that you had to rely on the 1 out of 100 editors who answered email.
I just edited a category that hadn't been edited for several months -- I cleared all the sites there whether they were yesterdays or 12 months old -- how could you put a time to review tag on that category?
In the end it comes down to the more help we have, the faster things get done. The problem is there's a *lot* to get done, and our priority is not the same as a webmasters (whose priority is to get *their* site listed).
I'm sure there ae people who are so ecstatic at answering the exact same question from people who not only didn't bother reading the submission guidelines, but ignored the posting guidelines for this forum as well that they would be happy if this communication channel closed as well.
It stays here as a service provided by a group of editors - it is not supported by the ODP/DMOZ/Netscape, but provided as a communications channel for those wanting to know what the status of *their* submission is.
For now, and the foreseeable (on my part) future, this is the best you're going to get. (Or we can go back to no communication at all)