RMC:
As long as you've been exposed to both sides it is OK to comment. I did support both sides, namely in liaison stress, so I've seen same kinds of problems both ways.
In terms of QA prior to delivery I would assume both sides would work hard on that. Sadly I think money still talks stronger so some discounts, concessions etc. will bring that acceptance from the customer side, always.
As for the competence of designers - I shouldn’t comment, being a stress guy
As for skills in North America it is worth say that if you worked in few place, they are definitely different, depending on where they work.
To get back to A380 wing it is fine. Still no explanation into why this info got public. I do not think this is a valid info for general population, not even for educated amateurs. It is too complex to be discussed in FI.