Was there an Obama Birther Bounce?

Claiming that the Birther issue was dominating the news, President Obama released his long form birth certificate on April 25, 2011 in an effort to quell the controversy...
Political pollsters and pundits searched for an immediate Presidential approval bounce:

Real Clear Politics' President Poll Average Data:
4/25/2011 Obama's approve/disapprove rating was 45.6 / 48.9% for a spread of -3.3
5/03/2011 Obama's approve/disapprove rating was 47.2 / 47.2% for a spread of 0.0
Data suggests a birther bounce of +1.6 / -1.7% for an Obama Birther Bounce of +3.3

Rasmussen poll numbers: