UK site still says "New" as well.
So, unless they go and change every county site they have, they are still technically in violation.
In violation of what? Paris Convention Article 10bis?
RogersDA kindly submitted the relevant FTC Advisory Opinion, as well as a blogger's comment that the "6 month rule" has not recently been used as a basis of enforcement.
The reasoning within the FTC guideline is pretty clear; they believe that using the term "new" for products that are more than six months old would, without exceptional circumstances, cause consumer confusion and harm (note that this was is in 1967, and they were probably not thinking of items costing anywhere near a MacPro, that are being bought by professionals).
FTC Advisory opinions are not binding on courts, other governmental entities, private parties, or even themselves; they are like a cop telling you, when they pull you over, that they generally only pull people over who do more than twelve mph over the speed limit. It is useful for you, but you cannot rely on it, and it does not change what the actual law is.
The actual US federal advertising laws are those created by the Lanham Act ( see
http://en.wikipedia.org/wiki/Lanham_Act ).
The FTC is not an international regulatory body enforcing some treaty against signatories, it is an American administrative body enforcing American laws on American companies to protect American consumers;
Apple needs to comport with the EU's advertising laws for its advertisements in the EU, the FTC may help investigate if requested, but an FTC advisory opinion on what the term "new" means has absolutely jack-all to do with the legality of Apple's EU advertisements.
The crux of the issue is whether or not the advertising is or will likely cause consumer confusion and harm, or if it is unfair to Apple's competition.