The Gallup poll found that a plurality - 47 percent - rated the choice of Sotomayor as "excellent" or "good." Twenty percent said it was "only fair" and 13 percent rated the nomination as "poor."
The poll was conducted on Tuesday, the day Obama announced the nomination.
Interestingly, Gallup also provides the following chart comparing the initial reaction to Sotomayor to that of John Roberts, Samuel Alito and Harriet Miers's nomination. It appears that Roberts performed best, followed by Sotomayor.
And, unsurprisingly, there is a significant partisan gap over the pick.
Also check out this chart on the party breakdown of the last four Supreme Court nominees. Looks like the excitement among Democrats for Sotomayor is about the same as the Republican excitement was for Alito, Miers and Roberts.
There was a margin of error of plus or minus 3 percent in the poll.