From the Daily Presidential Tracking Poll done by Rasmussen.
Overall, 48% of voters say they at least somewhat approve of the president's performance. Fifty-one percent (51%) disapprove. Data collected following the news concerning bin Laden shows no significant change in the president’s overall approval rating. The president’s job approval ratings have been remarkably stable over the past year-and-a-half when viewed on a month-by-month basis.
I think that this post explains pretty well the weak (possibly non-existent) bump in the polls.
See: OBL's Death a Victory for the Adults
Because when you drill down, the death of bin Laden has nothing to do with the core beliefs of this President or the entire liberal movement.
Then there was the devastating revelation that it took Obama 16 hours to green-light the operation to kill Osama.
See: Obama took SIXTEEN HOURS to make up his mind about Bin Laden mission
The headline alone is enough. (The rest of the article should still be read.)
Sixteen hours? Obama had to have known that there was a very high probability that one day, the CIA was going to come to him with "Sir, We have Bin Laden in our gun-sights. What are your orders?"
That moment came. He was unprepared - as if he did not know what the right thing to do was.
That is not good. It reinforces the suspicion expressed in the post from the American Thinker.
Obama has come out of this looking like he was unprepared to give the go order but once having been brought around to do that, decided to turn the affair into a campaign event.