If you're talking about average intelligence, perhaps. If you're talking about GDP, Per Capita Income, Military strength, scientific accomplishments, et cetera, then no. The only thing I can think of which the Brits are ahead in is employment percentages, and by a very small amount. Of course they are also have a much higher percentage of impoverished people.
The sad thing is that the USA is degrading into a police state with fewer freedoms and a government controlled media, much like Britain.
But yes, he does have a decent vocabulary for a 14 year old, even if its his only language.