There really was no decent forum already establish for the Acadia and Enclave, so those boards took off. saturnfans.com was already a well established forum and was doing a fairly good job of handling Outlook topics. We are adding more and more users everyday, and each month has shown in increase in members, posts, threads and visits. So eventually we'll gain some traction here. I'm a big fan of forums dedicated to an individual model, as opposed to forums that cover the entire lineup of a particular make (Saturn) or even manufacturer (GM), since you know that everyone there shares the same interests as you.
I've also wondered why there is so much more traffic on the Acadia and Enclave boards. Personally i think the main reason
is there are 3 to 4 times as many of the other lambdas on the road (just a rough guess). The saturnfans.com board is also good which would obviously take some traffic away from here but typically you see most of the same post and posters on both boards.