Obama's Speech a Success

From CNN:

"Two out of three Americans who watched President Obama's health care reform speech Wednesday night favor his health care plans, a 14-point gain among speech-watchers, according to a CNN/Opinion Research Corp. national poll." (emphasis mine)

Put differently, the difference between 52% support and 66% support is a, roughly, 25% increase in supporters for this bill from Wednesday morning to Wednesday evening.

Of course, all polls should be taken with a grain of salt.