PPP has boosted Dems in the crosstabs.
In 2010 elections, Gallup identified Mass as 13% Rep, 35% Dem and 50% Independent.
For this PPP poll, its suddenly 40% Dem and 45% Independent and 15% Rep. You see what they did here, turned a 14% spread from Dems to Ind into a 5% difference between them. They effectively gave the Dems a 9% advantage head start on real numbers.