Like JamesB said, the WSMs (300 and 270) outsell almost all rifles in our area now. I know I have a few buddies and neighbros that have bought new rifles in the last few years, and all were 300WSMs but 2 and those were 270WSMs. I personally would get a 7mm WSM, but thats only because I have stockpiled on .284 bulletts. The 325WSM hasn't been out long enough to sell heavily, but I would imagine it is going to be a good seller as well.
Like everyone said, the WSSMs are kinda sittin at a standstill with the bolt action crowd, but the AR crowd is eating them up. I'd still like to buy a 25WSSM to tinker with.