Just remember that what is going on with the Galaxy Nexus forums has repercussions throughout the entire site. If every carrier has a subforum there then people want it for their device area as well.
Most devices currently do not have carrier subdivisions unless there is a hardware difference as well.
It can take a while to make some of these decisions, and this isn't something that should be rushed. There is a lot for them to think about in regards to this. Also, whatever is decided is not going to make everyone happy. They try their best, but that just isn't possible.