If you're talking the forum, I don't think so, but we're new. Plus you'll find no matter what forum you're on (or what homebrew club you're involved with) there's a small core of people making most of the noise. I tend not o run around a lot on other forums these days, but there are some very active groups out there that I'm sure others will happily point you towards.
If you're talking the org itself, pretty certain. We're about 20k strong. Of course that's only a fraction of the number of homebrewers in America, but we'll keep working on that.