Zogby Analysis?

[leftist.]

I agree, just sitting here in my chair, looking at polls, drawing on parts I lived through, that Zogby seems to get it right more often than not. That said, is there any analysis that actually backs this up? What I mean is, has someone (or a group of someones) taken each pollster and done a study of sorts showing how/why Zogby is more accurate? If so, can someone link me please.

Thanks for any help.

... paris