Contrasts:

Last night, Laura Bush delivered one of the better political speeches by a spouse in quite some time. She help to shape the image of the president by offering her experiences and intimate details into the workings of the man. The speech was about the President, Not about her.

Contrast that to Teresa Heinz Kerry's address before the DNC. The speech was centered around her experiences not the senator's. The purpose of a spouse's speech before a convention is to humanize the candidate, not to state the first lady's credentials. That is why Laura Bush's speech has received a much more positive initial response than THK!