re: No.
"t's better if you go down to the Pew poll, which goes back further in time, and asks direct questions about Iraq. The decay in opinion is obvious, but while I'd have to graph it, I see no real point where it drops off drastically. "
As with most issues in group dynamics, the 'sea change' (good lord I hate that term) may be in the threshold of people believing a certain way and voicing that opinion, rather than some sort of conversion experience. With numbers of approval in the 20's, and the number of undecideds going constantly down, you are seeing an increasing and remarkable polarization. I say remarkable because its rare to find any issue of substance where 75%+ of the american people agree on.
DL