I've met a lot of therians here on the forums, and I have never seen discussion discouraged. That being said, a Therian board has never been created because of (first off) lack of traffic, and because therians can create discussion threads freely on the boards that exist (provided they are topic relevant). If a therian wants to be found, all they have to do is put that information in their signature where it is easily seen every time they post.
I don't, but that's because I see that as a personal part of myself that shouldn't be paraded around. I am much more likely to respond to therian related threads, however, because I enjoy the discussion.
That being said, there is a reason I hang out here and not on Therian forums. :p