Being listed or not at models.com (or anywhere else online) doesn't mean anything. There is just no reliable and up-to-date list of good or bad agencies.
Ranking and rating agencies is tricky and it's even more problematic to talk about details publicly. Depending on whom you ask you can get very different answers. An agency is always supposed to be bad if you ask a girl who isn't successful. While there is some general consent about the majors, as said, it becomes very difficult to talk about details publicly, especially also those who know aren't necessarily willing to talk about, it's a small world and you never know which hand will feed you tomorrow...
Things can also change very quickly, sometimes a single person who leaves can make a huge difference.
Further, as some mentioned it earlier in this thread, when it comes to aspiring models there's no generic answer simply because it depends on each girl's potential. Decisions are individual, even for girls of the same board of the same agency.
Different agencies can be focused on differenty markets and therefore their requirements will not only vary between agencies but they also change with time because what's in demand today may be outdated tomorrow.
Blunier