I agree that it should be consistent.
IMO, it seems a little bit too much to create brand new separate sites for Vim and Emacs.
As a vim user myself, I would be most glad if the central place for vim questions, were on: http://unix.stackexchange.com/questions/tagged/vim because many vim question are tightly coupled with questions about sed, awk, external shell commands, and after all vim itself is a text editor originating in unix (I know, it can be run on Windows, too, But it's still a Unix tool)
Now, I don't know if other vim users think like me (and I surely don't know how emacs users feel about it)... But, if they do, there's your answer..