So... I've changed my point since and even forgot that I had understood Meta in the different way before. How? I don't know. Moreover, I've written the question, which duplicated this one and contradicted with my old point of view.
Now, I don't think that on Meta, any question is about getting answers. Example? The bugs are often reported, but when reporting bug, a user is not asking for something generally. They are waiting for the official response, or for someone, who would say arguments for / against the bug fix.
Another example? Relatively often, we get new features, which are in the most cases accompanied with the feedback thread. I've said thread, because when announcing features, developers are not waiting for the answers (as we understand them on the non-meta communities), but for the feedback. Also, feature requests. They often lead to the discussion and certainly can't be answered in the way we are used to.
Conclusion is, I don't think that the Meta is not a discussion site. It's not really a forum though, but it's certainly made for discussions. And not always to get the answers, which ultimately applies only to the support questions.
Old answer (my old point of view):
I think that current message is good.
This site is all about getting answers.
yeah, isn't it? Or you don't want your questions to be answered?
It's not a discussion forum.
yes, it isn't. Because "we prefer questions that can be answered, not just discussed."
There's no chit-chat.
This is quite arguable, I think :D