Klaus. I really don't know, I'm just sorta surprised the CRJ900's gonna take so long to certify --3Q 2002, even though its first flight was this past February. Eighteen months, even though it's really very little more than a stretched 700, with some landing-gear and APU (and of course engine) upgrades.
So I'm just working from there, and not understanding how come it's gonna take that long. (on the other hand, both Embraer and Fairchild Dornier were announcing just really-speedy certifications, like several months or something, even though both of those are brand-new airframes. So I put it just down to marketing-team optimistic spin, since I don't know what's going on there, either, to make those procedures so short).
B747-437B, y'know it's not just Airbus, Boeing got mighty speedy certification for its 777s for instance, when they were announced (especially the derivatives).