Since we don't "assign" categories to editors, reviewing a specific node of the directory to find out how many editors there are there isn't going to be of much help.
A quick database query could determine a numerical percentage of threads reviewed overall.
"Popular" is in the eye of the beholder and usually means something different to surfers than to editors. Every category is popular with someone, but that doesn't mean that an editor will want to edit there on a regular basis.
By the term "Popular" i meant submission-wise. I am pretty sure there are more than 271 Consulting agencies that have been submitted -- a quick scan of google, yahoo, or bing would reveal that (domain list only), of which the majority are quality listings.
So just consolidating all of the information I have been provided
You really don't care what the user wants.
You only care what the "editors" feel are oh-so-worthy of their noteworthy attention in their otherwise busy lives (probably checking paypal for random payments).
There is no real conditions imposed on what really makes a site acceptable -- sort of a random flow of how the wind blows thing.
Double submissions in a period of 2 years is considered spam (1 submit / year).
You officially don't take any payment --- ... you can fill in the rest!
Time Warner/AOL is blamed for the pages showing outdated dates ---- for over 4 years now .... nice.
You have 200+ people who can pretty much mess around with anyones listings (if ever accepted), as well as manipulate the structure to their own free will, eg.. adding their own personal clientele / affiliations.
There are no internal investigations done -- either because you yourself are corrupted, or because of another reason such as you are aware of the problem, and simply don't care how this effects the "users"
Anyone can apply to edit any category, but of course those applications about as under reviewed as the listings themselves, not mentioning the fact that there are several unmonitered listings which I really don't care the reason why -- if no one is editing them because they decided to sit on the toilet for 62 months with a dirty magazine eating chips, someone else should be allowed to take over and/or edit -- which you see no reason to do that.
All listings submitted generally never get listed since no one is reviewing as everyone is asleep, dead, or otherwise in some sort of trance-like coma which incapacitates them of doing anything outside of their own personal clientele.
Does that pretty much sum everything up in a nutshell I may have missed a few points, but I think that is pretty much the uncaring gist of the situation at DMOZ/Time Warner/AOL.