https://bugs.archlinux.org/task/32673 is the original bug which I was told by Dave to upstream. :)
http://r2d2.webconverger.org/2012-11-15/not-silent-shutdown.html demonstrates the problem.
This should be fixed with:
I can't tell which revision that patch came in, but I can tell you today in systemd 215-4 on Archlinux, quiet shutdown still does not work.
Patch sent to mailing list: http://lists.freedesktop.org/archives/systemd-devel/2014-August/022756.html
*** This bug has been marked as a duplicate of bug 79582 ***