Any national poll taken anytime before September is worthless. We don’t know the issues nor do we have any clue what agenda Romney is going to be running on. We have no clue who else is going to be on the ballot. All we know are both elitist candidates are socialists and both candidates are liars.
National polls themselves seen to be worthless seeing how we don't elect by popular vote. As has been the case with the last few presidential elections, this one will be decided by voters in a handful of key swing states.
Last election I lived in California. I don't recall a single campaign ad. It seemed neither party bothered wasting their money for ads in California. This election I'm in Florida and I'm sure the ads here will be non-stop.