Modest but real:
There have now been six polls that were in the field since the Democratic primaries were concluded, and for which we have a previous trendline against which to compare. Barack Obama has gained ground in all six of those polls; his average bounce has been about 5 points.
This article available online at:
http://www.theatlantic.com/daily-dish/archive/2008/06/the-nomination-bounce/215406/
