Link "talks" in the game for sure. There are a few moments early on where you have dialogue options, essentially letting you continue a conversation with a guy or leave and move on. They aren't voiced, though. The options are more like "Oh, tell me more" and "Bye" than "Continue conversation" and "Leave," so the implcation is that Link is definitely capable of holding a conversation.
@vod_crack: The one thing I'll say is that if they're trying to emulate modern Bay Area hip-hop stations, then they're right to exclude almost all local acts. Bay Area hip-hop has always gotten the short end of the stick on KMEL. I don't listen to it anymore, but it always felt like they only jumped on local acts well after they blew up nationally.