It's not complacency, it's more that there's not been much to cheer about as far as domestic politics is concerned this past year (while the possibility of a civil war wasn't totally implausible just a few weeks ago) and now there is, even if it's not the most important thing in the world. And the idea that the government might get re-elected, while unlikely, isn't a total joke now.
I can understand that, however the euphoria (particularly within the LabourHome 'glasshouse' - ready to throw rocks but unwilling to acknowlege that their own house needs repair) seems a little forced.
On the flip side, I can take comfort in the fact that after a solid month of favourable and almost total coverage of the PM post conference season and the Tories finding it difficult to say or do anything meaningful on the economy (such are the limitations of opposition)
and the water of a ducks back that was the Osborne 'Affair' we still hold a double digit lead. Labour could not have asked for a better month and yet it also seems, neither could we.