FACT, most chicanos bump there own music, have there own swag, have there own slang, more than they have of others.
is there a small portion of all chicanos that listen to "black culture" music? yes.
is there a tiny tiny portion of blacks that listen to chicano music? sure.
So just because some chicanos use the word hyphy (and with music that has no correlation to bay areas hyphy) doesn't mean your culture has a big effect on chicanos, because it doesnt.
I aint gonna throw no numbers at you because these letters are probably blurry enough, but what you said has no connection to chicanos as a whole. Just a tiny fraction.