I only had to wait about 9 weeks as far as I remember, and that was right back at the beginning. I had a holiday booked anyway, a car-free cruise, and the car was waiting for me when I got back.
Funny things happen. When I got my previous car in 1999, a Peugeot 306 GTi-6, I was quoted several months build time, but then two or three weeks later the dealer rang and said your car will be here the day after tomorrow! I had to call Eurostar and change my booking on the chunnel train from the smaller Fiesta XR2 to the Peugeot, as I'd never imagined the Peugeot would be delivered before a planned trip to Holland.
The car which showed up was exactly my specification, with one exception. It had the boot-loading six-disc CD autochanger fitted, which I had decided against adding to my spec. I suspect someone cancelled the car, and when they looked around for a buyer, found my order sitting there almost matching it, and decided just the throw in the CD player for free.