IMO it's not just for hiding, as you can cover up things (like McLaren and others covered diffusers on real world launches), put dummy or old parts on it.
I think partly or mainly the reason is that they are behind their schedule and at the time of announcing and setting up the launch date and the execution of it, they couldn't be sure yet the car(s) could be built in time for that time and purpose.
The test is starting on 7th in Jerez, on 6th there couldn't be a built car in Milton Keynes if they have only 1 and they wanna test with that. There would be logistic issues to make that with one built car.
If they'll be in Jerez with their new car, what they could have hidden on it and for what period? A launch car is never newer and more usable than a new car you want to go round in circles in a test. So it's not more revealing. And it's only 1 day of hiding something.
So based on this logic, they may be behind their schedule, they won't have enough time and or cars to do conventional launch at their home base. Even doubtful they will be ready to start the test on Feb 7 with a new car.
But Schmidt has some truth in his article. Red Bull is not as good towards the fans as medias as they could or were.
Edited by hunnylander, 20 January 2012 - 08:04.