That means that they're not going past the first pages of the queue. And given that really bad posts probably "build up" at the front of the queue, that means a lot of janitors might not even get to pending posts. I don't approve a lot, but when I do, I actually try to use search instead of the queue, just because the queue is unfriendly.
I also dislike pressing the "no interest" button on images I'm not interested in approving (like porn) because it makes it look like one more janitor thinks the image isn't "interesting enough" for the site.