Independents are +2. Obama is + 2. McCain two points does better with republicans than Barack does with democrats and gets 2 points more democrats than Obama does from republicans. I think we can infer from that that IBD is using a Dem +2 or 3 weighting.
I’m going to re-visit this thread, and what you just said, tomorrow when I don’t have a headache and my noggin is working. I don’t doubt the the sample can be figured out inferentially as you say, but I can’t do no more inferrin’ tonight.
Night all.