The trend IS unmistakable - over-sample Dems in most polls based on 2008 turnout and you are relatively guaranteed to have polls skewed. You don't need to have a degree in mathematics to understand what the inevitable polling results show.
If what you’re saying were true, would Romney have to “take off the gloves”? He knows he’s behind and see no choice but to be more aggressive. Too little, too late in my opinion.