User blog comment:TeamTaycobSoDealWithIt/New Breaking Dawn Part 2 info (stills included)!/@comment-5505682-20120829002150/@comment-3984470-20120829004618

Those aren't actual members; they're just witnesses. In the book they had a lot, as well. Also, the guard is fairly big. There's more than just Felix, Demetri, Jane, Alec, etc. There are way more that we don't know the names of yet, lol. All in all, the Volturi just has more witnesses than the Cullens because, like what UBH said, the vegetarian vampires are a distinct minority, but also because they know less people. The Volturi has been around forever so of course they're going to know more people, and eventually have more witnesses.

The end.