I was just on the phone with Apple, and this time I've got another story: so Apple doesn't ship directly to EU customers from China, first it has to go to EU warehouse, and this is what the UPS tracking number refers to. To this estimate, we have to add a day or two for the delivery to us. According to Apple, the UPS tracking will update itself, once the macs are in said warehouse.
Honestly, in the past 3 days I've heard so many, often contradicting, information, that I don't know what to believe in anymore.
Maybe someone can call Apple and see if this story is confirmed?