Well that's true, but CX is rather late to the game and no matter what sort of deal they got with Airbus, I'm fairly certain they just couldn't secure early delivery slots at this point.
The first delivery is due sometime in 2016, which, according to the current schedule, is 3 years after its introduction into airline service. At the planned production rate, that means that at least 300 aircrafts will be in airline service by then.
It will be out of its teething phase, and the design improvements and weight reductions planned for the -800 will probably have been introduced on the -900 too.