"exaggerating" is a mild way of putting it.
Other than the article I linked, I have seen several sources on both sides making very similar judgments on how the election was won.
The blogosphere, especially (but not exclusively) on the Left, has a very exaggerated idea of its own importance. To the best of my knowledge, Lamont's primary win is their only major victory so far, and Lieberman handed Lamont his own ass.