The amount of decent rappers coming out of NYC and the East Coast can be counted on one hand. It seems like nearly every up coming rapper is from the South, West or Midwest.
If all the labels are in New York why can't a New Yorker come up? Nearly all of the new East Coast rappers that are actually getting recognition (French Montana, ASAP Rocky etc.) are using non-East Coast styles to get on (nothing wrong with that, just pointing it out).
And i'm talking about rappers with a shot of mainstream potential, so no Homeboy Sandmans or Skyzoos or whatever