Has it been resolved to make position:fixed induce a stacking context?

This blog post claims that the WG has resolved to make position:fixed
induce a stacking context:
http://updates.html5rocks.com/2012/09/Stacking-Changes-Coming-to-position-fixed-elements
Was this decision made at a F2F? I haven't seen anything about it on the
list. James Robinson brought this up on the list in May and in that thread
it was pointed out that Gecko and Opera are able to accelerate scrolling
without this spec change, so we shouldn't need to make it.

Rob
-- 
“You have heard that it was said, ‘Love your neighbor and hate your enemy.’
But I tell you, love your enemies and pray for those who persecute you,
that you may be children of your Father in heaven. ... If you love those
who love you, what reward will you get? Are not even the tax collectors
doing that? And if you greet only your own people, what are you doing more
than others?" [Matthew 5:43-47]