Cleverness can be measured in many ways, some people are clever in one way and others in another , however the idea of a select group of people from a set region
being more clever than the average across the rest of humanity is simply idiotic.
Comon sense would dictate that average cleverness would be worldwide and not regional . Same can be said for comon sense which in itself is a form of cleverness.
There is No evidance that any region " section " of community , country or anywhere is smarter than any other .