Diversity on Television?

I rarely use this space to talk seriously about anything (save for my affection for all things related to the Boobs, which is totally serious and for real.) That being said, a friend of mine did a little data mining to look at the relative dearth of minority leads on the fall schedule. I really hadn't given this much thought, but she's right, there really aren't that many minority characters on network TV these days. What do you all think? Is that bothersome? Discuss.