Well as was to be expected, eventually some kind of delay was going to come up. It didn't take long, weather pushing the slab pour back. The site supervisor so far has been pretty on top of things in making sure he calls each Thursday, but had to report that the slab was being pushed back to Wednesday due to the rain and further forecast.
While on the phone to him I took the opportunity to ask about any close-down over the new-year period - it sounds like the builders/contractors close down from the week before Christmas through to the second week of January, and they stagger build re-starts from then until the last week of January. So there could be anywhere from three to five weeks of no activity, which will push completion back (so we're looking at April now).