I haven't seen even a glimmer of that. He misuses words, e.g., enormity. He mispronounces words, e.g., corps pronounced corpse. He uses poor grammar, e.g., "President Bush invited Michelle and I to the White House."
Big deal, he got into Harvard and was editor or president of the Law Review. Unfortunately he just reinforces the stereotype of someone who has been promoted above his abilities.
I agree. His biggest asset, as I said, is that he is a performance artist. Someone else, with a less smooth delivery, would not have done nearly as well, even with all of the AA benefits. Take, for example, Deval Patrick.
I recall during the Presidential debates in 1992 that Bill Clinton said "I" in one of those "so-and-so and I" sentences where "me" was the grammatically correct form to use. Of course no one called him on it because he was a Democrat, and because most journalists probably didn't realize that he had used the wrong form.