Just before Z4 Coupe / M Coupe production started last week, BMW had got the veryy good news: the 2006 allocation had already been sold out in 9 countries (UK & Germany among them). Even before the car hit the showrooms! The demand is much stronger for Coupe than FL Roadster.
BMW expected strong demand for Z4 Coupe, but that exceeded their expectations.
Maybe some official words on this at BMW press conference this week.