You are right. Zogby nailed this one. Mason-Dixon was off, Mitchell was off, ARG was off (surprise, surprise), Datamar I think has fully discredited itself. It was off so far outside the MoE that it’s ridiculous.
Those polls which had Romney up by 2, reflected those who had definitely made up their minds. McCain had a lot of squishly support. Endorsements by Martinez and Crist solidified McCain’s support and pushed undecideds to his side. FL is one of the few states where Hispanics actively participate in a GOP primary. Thus decent turnout by Hispanics cancelled the vote of pro-border security conservatives.