I agree that the comments you posted are not sensitive, but they are true. The truth hurts sometimes. My wife is from New Orleans and she tells me that a lot of the underprivileged there were living in houses that had been passed down 3 or more generations. Although they had a house, they did not have electricity because they couldn't pay the utilities. They also didn't have 3 meals a day or access to showers. So, in reality, Barbara Bush is correct that many of these people will find themselves in a better situation than what they had. However, having to live with 15,000 other people in a stadium is far from ideal by any stretch of the imagination and I'm sure not the first, second, or third choice for anybody who is there.
What is reality is that most of the underpriveleged evacuees won't have the means to leave wherever they have been evacuated too. That is scary to the governments of Houston, Dallas, and San Antonio who now find that their population has grown by thousands of people who will not be paying taxes to help support the infrastructure that will be supporting them. There is money right now, but it is a real concern for the future.
This disaster will affect many aspects of our nation's economy on many levels. Refusing to discuss these issues because someone might get their feelings hurt won't help create long term solutions.