we've had both male and female persians and himalayans (colorpoint persians with siamese ancestry). on the whole, they are not among the most talkative breeds, but of course there are exceptions. in general, himi owners report more talking than noncolorpoint persians, but again that's a generalization.
i'd suspect what you're describing to be more a trait of an intact male cat.. however, it is possible that after neutering at this age, he will continue to be talkative (though perhaps a bit less) as it is part of his personality now as well... if you choose to keep him intact, please do it with the knowledge that should he start spraying in the future, the likelihood is high that he will continue to spray after desexing. This is one of the big reasons why we get persians in shelter and at our rescue.