@Cycloptichorn,
Yes, I think it matters, because a First Lady should show some class. I don't think anyone like Laura Bush would have ever said that for example, because she was the epitome of class. I think Michelle is okay, but I think its important for her to represent the country in a good way, which I am not sure that she does, so I think this matters if she did or did not say it.
This causes me to recall Michelle saying she was proud of her country for the first time or something like that, when Obama won the nomination. I think she harbors some bitterness about things, which also relates to what Obama himself thinks as well. Not that it matters greatly now, as I think we just need to vote in a new president 2 years from now, but this does potentially show that we have a First couple that is not all that sold on America.