I think it's more likely that the 17% number was an outlier -- Weyrich's tantrum wouldn't have had enough time to make that big of an effect, and Romney occassionally hit's 17% only to rapidly drop back to 13-14%, so he tends to get a few positive outliers from time to time (I have yet to determine a pattern).
Of course it’s not enough time for that kind of effect. It’s just that Team Mitt had their noses so bent out of shape yesterday over Weyrich’s tantrum that I couldn’t help but take another jab. Chalk up my comment to a cruel sense of humor.