You can “game” the system a little in your situation – there is, technically, nothing stopping you ordering on 31st december, then looking again at Q1 and if there’s something better for you, cancelling your order and re-ordering in Q1. If your wait ends up taking you into Q2 you COULD cancel AGAIN and reorder in Q2. It’s a bit of hassle, and a bit sneaky on the dealers, but it’s hard to be too sympathetic to them with all of the horror stories we hear about people being messed around BY the dealers. Remember that, until you actually enter your PIN when you collect the car, you are free to walk away at any point.
"Man is born in freedom, but he soon becomes a slave, in cages of convention, from the cradle, to the grave."