Just heard a little rumor, actually it would be a big rumor if it turns out true.
Airbus is having problems making projected QC2 departure and will/may fail contract obligations. Here is what I was told the projected noise levels are at currently:
A380
TO = 98.9
SL= 96.7
AP = 99.9
Could this be why, besides the weight problem, that Virgin and Air France have pushed off delivery so Airbus has time to run a noise reduction program as well as put the A380 on a diet?