Knocking copy?
Its interesting to see when this is or is not being used. Not just in the Boeing/Airbus market, but in general, it says something about what the advertiser or group funding the ad has to say about their customers.
Boeing/Airbus sell to a rather sophisticated customer base (or please correct me if I'm wrong). Airlines have their own engineering, maintenance and accounting staffs. They are (or should be) perfectly capable of judging whether or not a product does or does not live up to its' manufacturers claims. In the case of performance figures, its not like the facts can be covered up indefinitely. If you buy your competitor's product and it doesn't like up to their claims, that will become evident. Ad campaigns like this presume that the customer isn't smart enough to check their figures and needs to be hand held through the purchasing decision. Behaving like this often comes back to bite the advert sponsors in the nether regions.