FC10 and NetworkManager

[Timothy Murphy]

I read that FC10 Preview introduces NM "sharing" between users.
What exactly does this mean?
Does it mean a connection will be established (if possible)
before one logs in?

That is what I would like.
It used to be the normal behaviour with the network service.

But I've also read that FC10 Preview is identical to what one gets
if one updates FC10 Snap.
I've done this, and have not noticed any change in NM.