Professing to be "world-class" is one of the surest signs that you are not.
Is it only me who gets their hackles up every time a business, an institution or even a region, declares that they are "world-class"? There is always more than just a whiff of desperation associated with this claim, in my book.
In this sound-bite world, it could be argued that there isn't enough time (or enough characters) to explain, convince and convert people as to WHY you are worth engaging with, so "world-class" is the shorthand so many seem to resort to. But in reality it's lazy at best and self-deceptive at worst. "If I say it's true, then it must be true," is as far as some people take it, rather than actually working on making sure that their business, cause, event or region is delivering something that is truly admirable. Faking-it-until-you-make-it won't cut it here. It is also doubly ironic that the moniker gets adopted often times by people who seem blithely unaware of any kind of relevant global perspective.
I believe "world-class" is a very high accolade to aspire to, but you can't bestow it upon yourself. You can't claim it - you have to BE it and the world will notice. (And then you can tell people what others said!)
End of rant.