You can get a great deal of information for yourself, about how likelya site is to be listed (and how soon).
Just look at the website. Ask yourself: if this site dropped off of the web, then what would the sum of human culture lose? What knowledge and experience would be lost, or what economic transactions could no longer occur? If the answer is "nothing or not much", because the content creator really didn't know anything that any idiot couldn't have found in an hour's research at the library, or that couldn't already be found on a hundred websites -- then the site won't be listed.
If the answer is, "the content creator knew his subject intimately from many years touring (or living in, or guiding tourists in) the area, and it would be hard to find anyone else so uniquely knowledgeable", then the site is listable, but more questions remain.
"How likely is an editor to feel this category isn't comprehensive enough? Is it hard to find sites with unique content on the subject? (If so, your help will probably be keenly appreciated. If not, ... well, but then "how likely is this topic to be spammed to the ultimate limit, so that it's hardly worthwhile to search at all, unless you have some reliable guide, such as independent reviews or industry knowledge?" If the answer is "not at all likely", then there's a good chance of a review soon. If the answer is, "topic certain to be spammed to death" -- as is the case in real estate and travel and recreational drugs and gambling -- then there's NOT a good chance of a review soon.
And finally, "when the review comes, will the reviewer find the unique content?" In high-spam categories (and anywhere that user-friendly web design is practiced) the reviewer should be able to look at the home page and maybe two or three other pages linked from it, and see what's unique in and about the site. If a category is poorly-served already, the editor may take ten or fifteen minutes poking around for some glowing tidbit of new knowledge. If a category is the Armand of Hormels, spam capital of the spiral rim, then the editor in fairness OUGHT not to spend more than 40 or 50 SECONDS before going on to some site that MIGHT have unique content AND friendly navigation. Will your site pass that test?
Note: get someone else to help you with this last one. You KNOW where the content is, you're likely to click right through to it, rather than being befuddled by non-portable layout or distracting clutter like a real visitor might be.
I will not, of course, look at the site: it would be very unfair to polite owners of legitimate sites (even if it were not against forum policies). But anyone (whether or not they ever actually post in any forum) can use this same outline to analyze their own site.