I understand your anguish over the cars, and I don't work for Holden, so I can't give you the solid guts on when and where they are arriving.
Bear in mind that these cars come from one assembly line where all of Holden's domestic production occurs. 13 different bodies and many more trim, drivetrain and option variants come off this line. They can't just shut the Holden line and build all the cars in one hit - for one thing, they are holding orders for Australian cars including Monaros and the Commodore, which is Australia's biggest selling passenger vehicle.
The second issue is, compared to a stock fabric-trimmed vehicle, the leather insides, which have to go on the GTO, Monaro, SS, Berlina, Calais and Statesman; plus the Middle-East, Asia and Euro market cars. It takes longer to make, and the supplier would have to ramp up production.
Let me tell you - there are option/value packs, and deals to be had on superceded models, but Holden hasn't given incentives to customers in years - they sell most everything they build to order, and at MSRP or a minor discount. A few bigger dealers have SS Commodes and demo Monaros on the lot, but there are no big discounts on these. Ford does a lot of selling to corporates and taxis, because their car is cheaper to buy.
When the Monaro was conceived Holden was going to build 5,000 a year for three years - then it was gone forever. All of a sudden a year in that figure was quadrupled, and the car has a life extending into a new chassis format which means into the forseeable future. So a lot of this is unforseen, in industry terms where they try to plan in years. Holden has to increase capacity and maintain the quality which it appears it is. The Monaro is the biggest-selling sports coupe in Australia at that number, and it is an expensive car here - less than the top German cars, but dearer than the likes of the 350Z, RX8 and so on. It's 20% dearer than the 4-door SS V8 and 50% dearer than an SS Ute.
Yet Holden has built within 10% of the stated Monaro target figures. And there have been no recalls; apart from the LS1 oiling problem which affects a small number of cars there are no persistent reports of problems or bad warranty issues. That's one good thing about building off an 'old' platform - less problems.
I'd also say Holden is being careful with your cars - they want to sell to GM US and Europe in the future - for niche cars Holden may be it.
A growing trend in Australia is businesses to shut down over Christmas, but I suspect they are changing the line over to build the next-model VZ Commodore, which is to incorporate the new alloy V6 being cranked off the lines here in Melbourne. While you guys could give a damn, it's vital to Holden to get it right. So it's not really much of an excuse, but at least a little explanation.
So I'd say they'd be all care, but no responsibility!