I guess it would depend on how we chose to measure it.
There are more than 3000 members here, but at the moment, certainly no more than a couple of hundred are active.
When I joined, almost two years ago, the demographic appeared to be somewhat older and considerably more focused on the GF Trilogy than the membership seems to be today.
I'll say 75% of the first 1500 members (1125), plus 33% of the next 1500 (500), so my new estimate is around 50% or so.
Interesting question, though. You could always do a poll, but I don't think there would be enough responses to represent an accurate sample size. And all of the old (and older) members wouldn't be voting.