The technical committee split 4-4 between systemd and the Canonical-developed upstart. Technical committee chairman Bdale Garbee then used his casting vote in favour of systemd.
Garbee made the decision only on February 11 at 7.35am; this means it was late Tuesday evening in Australia when his post came to the mailing list.
Keith Packard, Russ Alberry, Don Armstrong and chairman Bdale Garbee opted for systemd while the other four - Colin Watson, Steve Langasek, Andreas Barth and Ian Jackson - expressed a preference for upstart.
But it seems very likely that the members of the project will propose a general resolution to override the use of systemd as default.